diff --git a/dart_filament/native/include/material/gizmo.h b/dart_filament/native/include/material/gizmo.h
index b598dac5..fd62c71d 100644
--- a/dart_filament/native/include/material/gizmo.h
+++ b/dart_filament/native/include/material/gizmo.h
@@ -3,12 +3,16 @@
 
 #include <stdint.h>
 
+#if defined(__cplusplus)
 extern "C"
 {
+#endif
     extern const uint8_t GIZMO_PACKAGE[];
     extern int GIZMO_GIZMO_OFFSET;
     extern int GIZMO_GIZMO_SIZE;
+#if defined(__cplusplus)
 }
+#endif
 #define GIZMO_GIZMO_DATA (GIZMO_PACKAGE + GIZMO_GIZMO_OFFSET)
 
 #endif
diff --git a/dart_filament/native/include/material/image.h b/dart_filament/native/include/material/image.h
index 6c233bc7..4761bfae 100644
--- a/dart_filament/native/include/material/image.h
+++ b/dart_filament/native/include/material/image.h
@@ -3,12 +3,16 @@
 
 #include <stdint.h>
 
+#if defined(__cplusplus)
 extern "C"
 {
+#endif
     extern const uint8_t IMAGE_PACKAGE[];
     extern int IMAGE_IMAGE_OFFSET;
     extern int IMAGE_IMAGE_SIZE;
+#if defined(__cplusplus)
 }
+#endif
 #define IMAGE_IMAGE_DATA (IMAGE_PACKAGE + IMAGE_IMAGE_OFFSET)
 
 #endif