diff --git a/EdgeImpulse.EI-SDK.pdsc b/EdgeImpulse.EI-SDK.pdsc
index 4c845b8..bb6b294 100644
--- a/EdgeImpulse.EI-SDK.pdsc
+++ b/EdgeImpulse.EI-SDK.pdsc
@@ -5,13 +5,16 @@
 	<name>EI-SDK</name>
 	<license>LICENSE-apache-2.0.txt</license>
 	<description>Edge Impulse SDK</description>
-	<url>https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.31/</url>
+	<url>https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.38/</url>
 	<supportContact>hello@edgeimpulse.com</supportContact>
 	<repository type="git">https://github.com/edgeimpulse/edge-impulse-sdk-pack.git</repository>
 	<releases>
-		<release version="1.49.31" tag="v1.49.31" date="2024-05-15" url="https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.31/EdgeImpulse.EI-SDK.1.49.31.pack">
+		<release version="1.49.38" tag="v1.49.38" date="2024-05-17" url="https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.38/EdgeImpulse.EI-SDK.1.49.38.pack">
       		EI-SDK
     	</release>	
+		<release version="1.49.31" tag="v1.49.31" date="2024-05-15" url="https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.31/EdgeImpulse.EI-SDK.1.49.31.pack">
+      		EI-SDK
+    	</release>
 		<release version="1.49.30" tag="v1.49.30" date="2024-05-14" url="https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.30/EdgeImpulse.EI-SDK.1.49.30.pack">
       		EI-SDK
     	</release>
@@ -140,7 +143,7 @@
     </packages>
     </requirements>
 	<components>
-		<component Cclass="EdgeImpulse" Cgroup="SDK" Cversion="1.49.31">
+		<component Cclass="EdgeImpulse" Cgroup="SDK" Cversion="1.49.38">
 			<description>Edge Impulse SDK</description>	
 				<!-- short component description -->
 				<files>
diff --git a/EdgeImpulse.pidx b/EdgeImpulse.pidx
index 2d6a712..6839ed6 100644
--- a/EdgeImpulse.pidx
+++ b/EdgeImpulse.pidx
@@ -2,8 +2,8 @@
 <index schemaVersion="1.0.0" xs:noNamespaceSchemaLocation="PackIndex.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
   <vendor>EdgeImpulse</vendor>
   <url>https://raw.githubusercontent.com/edgeimpulse/edge-impulse-sdk-pack/main/</url>
-  <timestamp>2024-05-15 12:07:36</timestamp>
+  <timestamp>2024-05-17 15:15:39</timestamp>
   <pindex>
-    <pdsc url="https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.31/" vendor="EdgeImpulse" name="EI-SDK" version="1.49.31"/>
+    <pdsc url="https://github.com/edgeimpulse/edge-impulse-sdk-pack/releases/download/v1.49.38/" vendor="EdgeImpulse" name="EI-SDK" version="1.49.38"/>
   </pindex>
 </index>
diff --git a/edgeimpulse/edge-impulse-sdk/classifier/ei_model_types.h b/edgeimpulse/edge-impulse-sdk/classifier/ei_model_types.h
index ddd5158..4c36205 100644
--- a/edgeimpulse/edge-impulse-sdk/classifier/ei_model_types.h
+++ b/edgeimpulse/edge-impulse-sdk/classifier/ei_model_types.h
@@ -100,10 +100,12 @@ typedef struct {
     uint32_t suppression_flags;
 } ei_model_performance_calibration_t;
 
+typedef int (*extract_fn_t)(ei::signal_t *signal, ei::matrix_t *output_matrix, void *config, float frequency);
+
 typedef struct {
     uint32_t blockId;
     size_t n_output_features;
-    int (*extract_fn)(ei::signal_t *signal, ei::matrix_t *output_matrix, void *config, const float frequency);
+    extract_fn_t extract_fn;
     void *config;
     uint8_t *axes;
     size_t axes_size;