diff --git a/thermion_dart/native/include/material/grid.h b/thermion_dart/native/include/material/grid.h
index 58dbdbd3..77277fea 100644
--- a/thermion_dart/native/include/material/grid.h
+++ b/thermion_dart/native/include/material/grid.h
@@ -3,11 +3,15 @@
 
 #include <stdint.h>
 
+#ifdef __cplusplus
 extern "C" {
+#endif    
     extern const uint8_t GRID_PACKAGE[];
     extern int GRID_GRID_OFFSET;
     extern int GRID_GRID_SIZE;
+#ifdef __cplusplus
 }
+#endif
 #define GRID_GRID_DATA (GRID_PACKAGE + GRID_GRID_OFFSET)
 
 #endif
diff --git a/thermion_dart/native/include/material/linear_depth.h b/thermion_dart/native/include/material/linear_depth.h
index 6b9c1893..93da2ede 100644
--- a/thermion_dart/native/include/material/linear_depth.h
+++ b/thermion_dart/native/include/material/linear_depth.h
@@ -3,11 +3,15 @@
 
 #include <stdint.h>
 
+#ifdef __cplusplus
 extern "C" {
+#endif
     extern const uint8_t LINEAR_DEPTH_PACKAGE[];
     extern int LINEAR_DEPTH_LINEAR_DEPTH_OFFSET;
     extern int LINEAR_DEPTH_LINEAR_DEPTH_SIZE;
+#ifdef __cplusplus
 }
+#endif
 #define LINEAR_DEPTH_LINEAR_DEPTH_DATA (LINEAR_DEPTH_PACKAGE + LINEAR_DEPTH_LINEAR_DEPTH_OFFSET)
 
 #endif
diff --git a/thermion_dart/native/include/material/outline.h b/thermion_dart/native/include/material/outline.h
index 0b9cc973..01de0db6 100644
--- a/thermion_dart/native/include/material/outline.h
+++ b/thermion_dart/native/include/material/outline.h
@@ -3,11 +3,15 @@
 
 #include <stdint.h>
 
+#ifdef __cplusplus
 extern "C" {
+#endif
     extern const uint8_t OUTLINE_PACKAGE[];
     extern int OUTLINE_OUTLINE_OFFSET;
     extern int OUTLINE_OUTLINE_SIZE;
+#ifdef __cplusplus
 }
+#endif
 #define OUTLINE_OUTLINE_DATA (OUTLINE_PACKAGE + OUTLINE_OUTLINE_OFFSET)
 
 #endif