diff --git a/opennurbs/CMakeLists.txt b/opennurbs/CMakeLists.txt
index c4430158..b49d0bf6 100644
--- a/opennurbs/CMakeLists.txt
+++ b/opennurbs/CMakeLists.txt
@@ -22,7 +22,8 @@ if (ENABLE_OPENNURBS)
     COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_brep_h.patch
     COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_cmake.patch
     COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_compress.patch
-    COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_defines.patch
+    COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_defines_h.patch
+    COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_defines_cpp.patch
     COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_example_brep.patch
     COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_example_gl.patch
     COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/opennurbs_file_utilities.patch
diff --git a/opennurbs/opennurbs_defines_cpp.patch b/opennurbs/opennurbs_defines_cpp.patch
new file mode 100644
index 00000000..db7d98ca
--- /dev/null
+++ b/opennurbs/opennurbs_defines_cpp.patch
@@ -0,0 +1,14 @@
+diff --git a/opennurbs_defines.cpp b/opennurbs_defines.cpp
+index 8d5f8830..1f60f588 100644
+--- a/opennurbs_defines.cpp
++++ b/opennurbs_defines.cpp
+@@ -498,6 +498,9 @@ int ON::CloseAllFiles()
+ #elif defined(ON_RUNTIME_APPLE) || defined(ON_RUNTIME_ANDROID)
+   //fcloseall is not supported on mac/ios or android
+   return EOF;
++#elif defined(BSD)
++  fcloseall();
++  return 0;
+ #else
+   return fcloseall();
+ #endif
diff --git a/opennurbs/opennurbs_defines.patch b/opennurbs/opennurbs_defines_h.patch
similarity index 99%
rename from opennurbs/opennurbs_defines.patch
rename to opennurbs/opennurbs_defines_h.patch
index d9f4cd06..259d8d90 100644
--- a/opennurbs/opennurbs_defines.patch
+++ b/opennurbs/opennurbs_defines_h.patch
@@ -8,7 +8,7 @@
 +#define ON_CLASS __attribute__ ((visibility ("default")))
 +#define ON_DECL __attribute__ ((visibility ("default")))
 +#define ON_EXTERN_DECL __attribute__ ((visibility ("default")))
-+
++
  #elif defined(ON_COMPILER_CLANG)
  /* using opennurbs as an Apple shared library */
  #define ON_CLASS __attribute__ ((visibility ("default")))