diff --git a/include/merian-shaders/bit_twiddling.glsl b/include/merian-shaders/bit_twiddling.glsl
index 4a51b8f..9b3ca68 100644
--- a/include/merian-shaders/bit_twiddling.glsl
+++ b/include/merian-shaders/bit_twiddling.glsl
@@ -1,5 +1,5 @@
-#ifndef _BIT_TWIDDLING_H_
-#define _BIT_TWIDDLING_H_
+#ifndef _MERIAN_SHADERS_BIT_TWIDDLING_H_
+#define _MERIAN_SHADERS_BIT_TWIDDLING_H_
 
 uint next_power_of_two(uint v) {
     v--;
@@ -13,4 +13,4 @@ uint next_power_of_two(uint v) {
     return v;
 }
 
-#endif // _BIT_TWIDDLING_H_
+#endif // _MERIAN_SHADERS_BIT_TWIDDLING_H_
diff --git a/include/merian-shaders/bsdf_diffuse.glsl b/include/merian-shaders/bsdf_diffuse.glsl
index f91669a..e6892a3 100644
--- a/include/merian-shaders/bsdf_diffuse.glsl
+++ b/include/merian-shaders/bsdf_diffuse.glsl
@@ -1,8 +1,8 @@
 #include "merian-shaders/sampling.glsl"
 #include "merian-shaders/frames.glsl"
 
-#ifndef _BSDF_DIFFUSE_H_
-#define _BSDF_DIFFUSE_H_
+#ifndef _MERIAN_SHADERS_BSDF_DIFFUSE_H_
+#define _MERIAN_SHADERS_BSDF_DIFFUSE_H_
 
 // n must be normalized
 #define bsdf_diffuse_sample(n, random) (make_frame(n) * sample_cos(random))
diff --git a/include/merian-shaders/bsdf_microfacet.glsl b/include/merian-shaders/bsdf_microfacet.glsl
index 872c636..39b8fc4 100644
--- a/include/merian-shaders/bsdf_microfacet.glsl
+++ b/include/merian-shaders/bsdf_microfacet.glsl
@@ -5,8 +5,8 @@
  * microfacet model by jonathan:
  */
 
-#ifndef _BSDF_MICROFACET_H_
-#define _BSDF_MICROFACET_H_
+#ifndef _MERIAN_SHADERS_BSDF_MICROFACET_H_
+#define _MERIAN_SHADERS_BSDF_MICROFACET_H_
 
 //-----------------------------------------------------------------
 
diff --git a/include/merian-shaders/camera.glsl b/include/merian-shaders/camera.glsl
index 36c2c29..b8e6811 100644
--- a/include/merian-shaders/camera.glsl
+++ b/include/merian-shaders/camera.glsl
@@ -1,7 +1,7 @@
 #include "merian-shaders/common.glsl"
 
-#ifndef _CAMERA_H_
-#define _CAMERA_H_
+#ifndef _MERIAN_SHADERS_CAMERA_H_
+#define _MERIAN_SHADERS_CAMERA_H_
 
 // importance sample the blackman harris pixel filter with 1.5px radius support
 vec2 pixel_offset_blackman_harris(const vec2 rand) {
diff --git a/include/merian-shaders/color/colors_dng.glsl b/include/merian-shaders/color/colors_dng.glsl
index fbdae10..9f250cd 100644
--- a/include/merian-shaders/color/colors_dng.glsl
+++ b/include/merian-shaders/color/colors_dng.glsl
@@ -1,5 +1,5 @@
-#ifndef _COLORS_DNG_H_
-#define _COLORS_DNG_H_
+#ifndef _MERIAN_SHADERS_COLORS_DNG_H_
+#define _MERIAN_SHADERS_COLORS_DNG_H_
 
 /*
 Adapted from VKDT, licensed under:
diff --git a/include/merian-shaders/color/colors_dtucs.glsl b/include/merian-shaders/color/colors_dtucs.glsl
index e7b6eb1..8a2c56c 100644
--- a/include/merian-shaders/color/colors_dtucs.glsl
+++ b/include/merian-shaders/color/colors_dtucs.glsl
@@ -1,5 +1,5 @@
-#ifndef _COLORS_DTUCS_H_
-#define _COLORS_DTUCS_H_
+#ifndef _MERIAN_SHADERS_COLORS_DTUCS_H_
+#define _MERIAN_SHADERS_COLORS_DTUCS_H_
 
 /* The following is darktable Uniform Color Space 2022
  * © Aurélien Pierre
diff --git a/include/merian-shaders/color/colors_munsell.glsl b/include/merian-shaders/color/colors_munsell.glsl
index c520dbf..ace7301 100644
--- a/include/merian-shaders/color/colors_munsell.glsl
+++ b/include/merian-shaders/color/colors_munsell.glsl
@@ -1,7 +1,7 @@
 #include "merian-shaders/common.glsl"
 
-#ifndef _COLORS_MUNSELL_H_
-#define _COLORS_MUNSELL_H_
+#ifndef _MERIAN_SHADERS_COLORS_MUNSELL_H_
+#define _MERIAN_SHADERS_COLORS_MUNSELL_H_
 
 /*
 Adapted from VKDT, licensed under:
diff --git a/include/merian-shaders/color/colors_rec2020.glsl b/include/merian-shaders/color/colors_rec2020.glsl
index 1785190..da9abcc 100644
--- a/include/merian-shaders/color/colors_rec2020.glsl
+++ b/include/merian-shaders/color/colors_rec2020.glsl
@@ -1,5 +1,5 @@
-#ifndef _COLORS_REC2020_H_
-#define _COLORS_REC2020_H_
+#ifndef _MERIAN_SHADERS_COLORS_REC2020_H_
+#define _MERIAN_SHADERS_COLORS_REC2020_H_
 
 
 vec3 rec2020_to_xyY(vec3 rec2020) {
diff --git a/include/merian-shaders/color/colors_srgb.glsl b/include/merian-shaders/color/colors_srgb.glsl
index 9189a19..894ed17 100644
--- a/include/merian-shaders/color/colors_srgb.glsl
+++ b/include/merian-shaders/color/colors_srgb.glsl
@@ -1,5 +1,5 @@
-#ifndef _COLORS_SRGB_H_
-#define _COLORS_SRGB_H_
+#ifndef _MERIAN_SHADERS_COLORS_SRGB_H_
+#define _MERIAN_SHADERS_COLORS_SRGB_H_
 
 // Converts the curve from sRGB to linear. Primary chromaticities are not transformed (output is close to rec709).
 vec3 srgb_to_rgb(vec3 srgb) {
diff --git a/include/merian-shaders/color/colors_xyz.glsl b/include/merian-shaders/color/colors_xyz.glsl
index 6fca326..58a3f1c 100644
--- a/include/merian-shaders/color/colors_xyz.glsl
+++ b/include/merian-shaders/color/colors_xyz.glsl
@@ -1,5 +1,5 @@
-#ifndef _COLORS_XYZ_H_
-#define _COLORS_XYZ_H_
+#ifndef _MERIAN_SHADERS_COLORS_XYZ_H_
+#define _MERIAN_SHADERS_COLORS_XYZ_H_
 
 float XYZ_luminance(const vec3 rgb) {
     return dot(rgb, vec3(0.2126729, 0.7151522, 0.0721750));
diff --git a/include/merian-shaders/color/colors_yuv.glsl b/include/merian-shaders/color/colors_yuv.glsl
index 337ce9c..33f1d4d 100644
--- a/include/merian-shaders/color/colors_yuv.glsl
+++ b/include/merian-shaders/color/colors_yuv.glsl
@@ -1,5 +1,5 @@
-#ifndef _COLORS_YUV_H_
-#define _COLORS_YUV_H_
+#ifndef _MERIAN_SHADERS_COLORS_YUV_H_
+#define _MERIAN_SHADERS_COLORS_YUV_H_
 
 #define yuv_luminance(rgb) dot(rgb, vec3(0.299, 0.587, 0.114))
 
diff --git a/include/merian-shaders/common.glsl b/include/merian-shaders/common.glsl
index 52d2274..5340197 100644
--- a/include/merian-shaders/common.glsl
+++ b/include/merian-shaders/common.glsl
@@ -1,5 +1,5 @@
-#ifndef _COMMON_H_
-#define _COMMON_H_
+#ifndef _MERIAN_SHADERS_COMMON_H_
+#define _MERIAN_SHADERS_COMMON_H_
 
 #define M_PI   3.14159265358979323846
 #define TWO_PI 6.283185307179586
@@ -9,4 +9,4 @@
 // returns 1/x if x > 0 else 1.
 #define SAFE_RECIPROCAL(x) (x > 0. ? 1. / x : 1.0)
 
-#endif // _COMMON_H_
+#endif // _MERIAN_SHADERS_COMMON_H_
diff --git a/include/merian-shaders/cubemap.glsl b/include/merian-shaders/cubemap.glsl
index a69b764..d0ea5ce 100644
--- a/include/merian-shaders/cubemap.glsl
+++ b/include/merian-shaders/cubemap.glsl
@@ -1,5 +1,5 @@
-#ifndef _CUBEMAP_H_
-#define _CUBEMAP_H_
+#ifndef _MERIAN_SHADERS_CUBEMAP_H_
+#define _MERIAN_SHADERS_CUBEMAP_H_
 
 // 0: pos x, 1: neg x, 2: pos y, 3: neg: y, 4: pos z, 5: neg z
 uint cubemap_side(const vec3 w) {
diff --git a/include/merian-shaders/frames.glsl b/include/merian-shaders/frames.glsl
index 31d7caa..62f65f7 100644
--- a/include/merian-shaders/frames.glsl
+++ b/include/merian-shaders/frames.glsl
@@ -1,5 +1,5 @@
-#ifndef _FRAMES_H_
-#define _FRAMES_H_
+#ifndef _MERIAN_SHADERS_FRAMES_H_
+#define _MERIAN_SHADERS_FRAMES_H_
 
 // Returns a matrix of axis (x, y, z) which all being perpendicular to each other
 mat3x3 make_frame(vec3 z) {
diff --git a/include/merian-shaders/gbuffer.glsl.h b/include/merian-shaders/gbuffer.glsl.h
index 30e1200..3f60015 100644
--- a/include/merian-shaders/gbuffer.glsl.h
+++ b/include/merian-shaders/gbuffer.glsl.h
@@ -1,7 +1,7 @@
 #include "merian-shaders/types.glsl.h"
 
-#ifndef _GBUFFER_H_
-#define _GBUFFER_H_
+#ifndef _MERIAN_SHADERS_GBUFFER_H_
+#define _MERIAN_SHADERS_GBUFFER_H_
 
 #ifdef __cplusplus
 namespace merian_nodes {
diff --git a/include/merian-shaders/grid.glsl b/include/merian-shaders/grid.glsl
index 90a76b3..2e0d946 100644
--- a/include/merian-shaders/grid.glsl
+++ b/include/merian-shaders/grid.glsl
@@ -1,7 +1,7 @@
 #include "merian-shaders/cubemap.glsl"
 
-#ifndef _GRID_H_
-#define _GRID_H_
+#ifndef _MERIAN_SHADERS_GRID_H_
+#define _MERIAN_SHADERS_GRID_H_
 
 // Determines the grid cell of pos and returns the lower vertex indices.
 // The vertex pos then is index * cell_width.
diff --git a/include/merian-shaders/hash.glsl b/include/merian-shaders/hash.glsl
index 5a08816..41cffa9 100644
--- a/include/merian-shaders/hash.glsl
+++ b/include/merian-shaders/hash.glsl
@@ -1,5 +1,5 @@
-#ifndef _HASH_H_
-#define _HASH_H_
+#ifndef _MERIAN_SHADERS_HASH_H_
+#define _MERIAN_SHADERS_HASH_H_
 
 // Jarzynski et al. From Hash Functions for GPU Rendering
 // Fastest to highest quality
diff --git a/include/merian-shaders/interpolate.glsl b/include/merian-shaders/interpolate.glsl
index 2ad28b1..f8492fc 100644
--- a/include/merian-shaders/interpolate.glsl
+++ b/include/merian-shaders/interpolate.glsl
@@ -1,5 +1,5 @@
-#ifndef _INTERPOLATE_H_
-#define _INTERPOLATE_H_
+#ifndef _MERIAN_SHADERS_INTERPOLATE_H_
+#define _MERIAN_SHADERS_INTERPOLATE_H_
 
 // like smoothstep but without Hermite smoothing
 float linearstep(const float edge0, const float edge1, const float x) {
diff --git a/include/merian-shaders/intersect.glsl b/include/merian-shaders/intersect.glsl
index 2a16f55..faad73b 100644
--- a/include/merian-shaders/intersect.glsl
+++ b/include/merian-shaders/intersect.glsl
@@ -1,5 +1,5 @@
-#ifndef _INTERSECT_H_
-#define _INTERSECT_H_
+#ifndef _MERIAN_SHADERS_INTERSECT_H_
+#define _MERIAN_SHADERS_INTERSECT_H_
 
 // Returns t such that ray_origin + t * ray_dir = intersection
 #define intersect_ray_plane(plane_origin, plane_normal, ray_origin, ray_dir) (dot(plane_normal, plane_origin - ray_origin) / dot(plane_normal, ray_dir))
diff --git a/include/merian-shaders/linalg.glsl b/include/merian-shaders/linalg.glsl
index 3c3dca8..d06c56c 100644
--- a/include/merian-shaders/linalg.glsl
+++ b/include/merian-shaders/linalg.glsl
@@ -1,5 +1,5 @@
-#ifndef _LINALG_H_
-#define _LINALG_H_
+#ifndef _MERIAN_SHADERS_LINALG_H_
+#define _MERIAN_SHADERS_LINALG_H_
 
 
 // Returns the Moore-Penrose inverse also known as the pseudoinverse A+ = (A^TA)^-1 * A^T.
@@ -31,4 +31,4 @@ void pseudoinverse(const vec3 du, const vec3 dv, out vec3 du_dx, out vec3 dv_dx)
     pseudoinverse(du, dv, cross(du, dv), du_dx, dv_dx);
 }
 
-#endif // _LINALG_H_
+#endif // _MERIAN_SHADERS_LINALG_H_
diff --git a/include/merian-shaders/morton.glsl b/include/merian-shaders/morton.glsl
index 3c9bee8..14a5aa6 100644
--- a/include/merian-shaders/morton.glsl
+++ b/include/merian-shaders/morton.glsl
@@ -1,5 +1,5 @@
-#ifndef _MORTON_H_
-#define _MORTON_H_
+#ifndef _MERIAN_SHADERS_MORTON_H_
+#define _MERIAN_SHADERS_MORTON_H_
 
 #include "merian-shaders/bit_twiddling.glsl"
 
@@ -31,4 +31,4 @@ uint morton_encode2d(const uvec2 p, in uint width, in uint height) {
 }
 
 
-#endif // _MORTON_H_
+#endif // _MERIAN_SHADERS_MORTON_H_
diff --git a/include/merian-shaders/normal_encode.glsl b/include/merian-shaders/normal_encode.glsl
index a3422e7..05262d6 100644
--- a/include/merian-shaders/normal_encode.glsl
+++ b/include/merian-shaders/normal_encode.glsl
@@ -1,5 +1,5 @@
-#ifndef _NORMAL_ENCODE_H_
-#define _NORMAL_ENCODE_H_
+#ifndef _MERIAN_SHADERS_NORMAL_ENCODE_H_
+#define _MERIAN_SHADERS_NORMAL_ENCODE_H_
 
 vec2 sign_no0(const vec2 v)
 {
diff --git a/include/merian-shaders/phase_draine.glsl b/include/merian-shaders/phase_draine.glsl
index c92d8cf..4263785 100644
--- a/include/merian-shaders/phase_draine.glsl
+++ b/include/merian-shaders/phase_draine.glsl
@@ -1,5 +1,5 @@
-#ifndef _PHASE_DRAINE_H_
-#define _PHASE_DRAINE_H_
+#ifndef _MERIAN_SHADERS_PHASE_DRAINE_H_
+#define _MERIAN_SHADERS_PHASE_DRAINE_H_
 
 /*
  * SPDX-FileCopyrightText: Copyright (c) <2023> NVIDIA CORPORATION & AFFILIATES. All rights reserved.
diff --git a/include/merian-shaders/phase_isotropic.glsl b/include/merian-shaders/phase_isotropic.glsl
index b2d8910..b5c284c 100644
--- a/include/merian-shaders/phase_isotropic.glsl
+++ b/include/merian-shaders/phase_isotropic.glsl
@@ -1,8 +1,8 @@
 #include "merian-shaders/sampling.glsl"
 #include "merian-shaders/frames.glsl"
 
-#ifndef _PHASE_ISOTROPIC_H_
-#define _PHASE_ISOTROPIC_H_
+#ifndef _MERIAN_SHADERS_PHASE_ISOTROPIC_H_
+#define _MERIAN_SHADERS_PHASE_ISOTROPIC_H_
 
 #define phase_isotropic_sample(random) sample_sphere(random)
 
diff --git a/include/merian-shaders/phase_rayleigh.glsl b/include/merian-shaders/phase_rayleigh.glsl
index 0f2d7db..1c8cd29 100644
--- a/include/merian-shaders/phase_rayleigh.glsl
+++ b/include/merian-shaders/phase_rayleigh.glsl
@@ -1,5 +1,5 @@
-#ifndef _PHASE_RAYLEIGH_H_
-#define _PHASE_RAYLEIGH_H_
+#ifndef _MERIAN_SHADERS_PHASE_RAYLEIGH_H_
+#define _MERIAN_SHADERS_PHASE_RAYLEIGH_H_
 
 float phase_rayleigh(const float cos_theta) {
     return 3 * (1 + cos_theta * cos_theta) / 4;
diff --git a/include/merian-shaders/random.glsl b/include/merian-shaders/random.glsl
index 84a2645..4ca7549 100644
--- a/include/merian-shaders/random.glsl
+++ b/include/merian-shaders/random.glsl
@@ -1,5 +1,5 @@
-#ifndef _RANDOM_H_
-#define _RANDOM_H_
+#ifndef _MERIAN_SHADERS_RANDOM_H_
+#define _MERIAN_SHADERS_RANDOM_H_
 
 // Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs"
 // Returns random float in [0, 1) and updates state.
diff --git a/include/merian-shaders/ray_differential.glsl b/include/merian-shaders/ray_differential.glsl
index 09f9aee..aa363a5 100644
--- a/include/merian-shaders/ray_differential.glsl
+++ b/include/merian-shaders/ray_differential.glsl
@@ -1,5 +1,5 @@
-#ifndef _RAYDIFFERENTIAL_H_
-#define _RAYDIFFERENTIAL_H_
+#ifndef _MERIAN_SHADERS_RAYDIFFERENTIAL_H_
+#define _MERIAN_SHADERS_RAYDIFFERENTIAL_H_
 
 struct RayDifferential {
     // current differential of origin
@@ -29,4 +29,4 @@ void ray_diff_propagate(inout RayDifferential rd,
 }
 
 
-#endif // _RAYDIFFERENT_H_
+#endif // _MERIAN_SHADERS_RAYDIFFERENTIAL_H_
diff --git a/include/merian-shaders/raytrace.glsl b/include/merian-shaders/raytrace.glsl
index a2e8d80..ab5de03 100644
--- a/include/merian-shaders/raytrace.glsl
+++ b/include/merian-shaders/raytrace.glsl
@@ -1,5 +1,5 @@
-#ifndef _RAYTRACE_H_
-#define _RAYTRACE_H_
+#ifndef _MERIAN_SHADERS_RAYTRACE_H_
+#define _MERIAN_SHADERS_RAYTRACE_H_
 
 #define _rq_get_t(ray_query, commited) rayQueryGetIntersectionTEXT(ray_query, commited)
 #define _rq_instance_id(ray_query, commited) rayQueryGetIntersectionInstanceIdEXT(ray_query, commited)
diff --git a/include/merian-shaders/reprojection.glsl b/include/merian-shaders/reprojection.glsl
index 60b1dd2..06cd449 100644
--- a/include/merian-shaders/reprojection.glsl
+++ b/include/merian-shaders/reprojection.glsl
@@ -1,3 +1,5 @@
+#ifndef _MERIAN_SHADERS_REPROJECTION
+#define _MERIAN_SHADERS_REPROJECTION
 
 // Computes a weight for the quality of the reprojection.
 // Reprojections with normals further away than normal_reject_cos = cos(alpha)
@@ -40,3 +42,5 @@ bool reprojection_intersect_border(inout vec2 prev_pos, const vec2 mv, const vec
     }
     return false;
 }
+
+#endif
diff --git a/include/merian-shaders/sampler.glsl b/include/merian-shaders/sampler.glsl
index c5f2cb5..cfe2308 100644
--- a/include/merian-shaders/sampler.glsl
+++ b/include/merian-shaders/sampler.glsl
@@ -1,5 +1,5 @@
-#ifndef _SAMPLER_H_
-#define _SAMPLER_H_
+#ifndef _MERIAN_SHADERS_SAMPLER_H_
+#define _MERIAN_SHADERS_SAMPLER_H_
 
 // Adapted for Vulkan from https://gist.github.com/TheRealMJP/c83b8c0f46b63f3a88a5986f4fa982b1
 // (MIT License)
diff --git a/include/merian-shaders/sampling.glsl b/include/merian-shaders/sampling.glsl
index 4462990..97885cf 100644
--- a/include/merian-shaders/sampling.glsl
+++ b/include/merian-shaders/sampling.glsl
@@ -1,8 +1,8 @@
 #include "merian-shaders/common.glsl"
 #include "merian-shaders/random.glsl"
 
-#ifndef _SAMPLING_H_
-#define _SAMPLING_H_
+#ifndef _MERIAN_SHADERS_SAMPLING_H_
+#define _MERIAN_SHADERS_SAMPLING_H_
 
 // sample sphere, p = 1 / 4pi
 vec3 sample_sphere(const vec2 random) {
diff --git a/include/merian-shaders/textures.glsl b/include/merian-shaders/textures.glsl
index f7ba6df..48e00e7 100644
--- a/include/merian-shaders/textures.glsl
+++ b/include/merian-shaders/textures.glsl
@@ -1,5 +1,5 @@
-#ifndef _TEXTURES_H_
-#define _TEXTURES_H_
+#ifndef _MERIAN_SHADERS_TEXTURES_H_
+#define _MERIAN_SHADERS_TEXTURES_H_
 
 // adapted from gl_warp.c
 #define MERIAN_TEXTUREEFFECT_QUAKE_WARPCALC(st, time) (2 * ((st) + 0.125 * sin(vec2(3 * (st).yx + 0.5 * (time)))))
@@ -7,4 +7,4 @@
 #define MERIAN_TEXTUREEFFECT_WAVES(st, time) (-vec2(.1, 0) * cos((st).x * 5 + (time) * 2) * pow(max(sin((st).x * 5 + (time) * 2), 0), 5) \
                          -vec2(.07, 0) * cos(-(st).x * 5 + -(st).y * 3 + (time) * 3) * pow(max(sin(-(st).x * 5 + -(st).y * 3 + (time) * 3), 0), 5))
 
-#endif // _TEXTURES_H_
+#endif // _MERIAN_SHADERS_TEXTURES_H_
diff --git a/include/merian-shaders/tonemap.glsl b/include/merian-shaders/tonemap.glsl
index 3a16944..652c3cc 100644
--- a/include/merian-shaders/tonemap.glsl
+++ b/include/merian-shaders/tonemap.glsl
@@ -2,8 +2,8 @@
 #include "merian-shaders/color/colors_srgb.glsl"
 #include "merian-shaders/common.glsl"
 
-#ifndef _TONEMAP_H_
-#define _TONEMAP_H_
+#ifndef _MERIAN_SHADERS_TONEMAP_H_
+#define _MERIAN_SHADERS_TONEMAP_H_
 
 vec3 tonemap_clamp(const vec3 rgb) {
     return clamp(rgb, vec3(0), vec3(1));
diff --git a/include/merian-shaders/transmittance.glsl b/include/merian-shaders/transmittance.glsl
index 45a7047..eca350e 100644
--- a/include/merian-shaders/transmittance.glsl
+++ b/include/merian-shaders/transmittance.glsl
@@ -1,5 +1,5 @@
-#ifndef _TRANSMITTANCE_H_
-#define _TRANSMITTANCE_H_
+#ifndef _MERIAN_SHADERS_TRANSMITTANCE_H_
+#define _MERIAN_SHADERS_TRANSMITTANCE_H_
 
 // Beer-Lambert law / Beer's law
 
diff --git a/include/merian-shaders/types.glsl.h b/include/merian-shaders/types.glsl.h
index ce5c0da..ed53b24 100644
--- a/include/merian-shaders/types.glsl.h
+++ b/include/merian-shaders/types.glsl.h
@@ -1,5 +1,5 @@
-#ifndef _TYPES_H_
-#define _TYPES_H_
+#ifndef _MERIAN_SHADERS_TYPES_H_
+#define _MERIAN_SHADERS_TYPES_H_
 
 #ifdef __cplusplus
 
diff --git a/include/merian-shaders/von_mises_fisher.glsl b/include/merian-shaders/von_mises_fisher.glsl
index f4bad81..33299b0 100644
--- a/include/merian-shaders/von_mises_fisher.glsl
+++ b/include/merian-shaders/von_mises_fisher.glsl
@@ -1,8 +1,8 @@
 #include "merian-shaders/common.glsl"
 #include "merian-shaders/frames.glsl"
 
-#ifndef _VON_MISES_FISHER_H_
-#define _VON_MISES_FISHER_H_
+#ifndef _MERIAN_SHADERS_VON_MISES_FISHER_H_
+#define _MERIAN_SHADERS_VON_MISES_FISHER_H_
 
 // Based on Wenzel Jakob, Numerically stable sampling of the von Mises Fisher distribution on S2 (and other tricks)