diff --git a/evs/1.0/default/EvsCamera.h b/evs/1.0/default/EvsCamera.h
index 8d644a0..02a677c 100644
--- a/evs/1.0/default/EvsCamera.h
+++ b/evs/1.0/default/EvsCamera.h
@@ -58,7 +58,7 @@
     unsigned decreaseAvailableFrames_Locked(unsigned numToRemove);
 
     void generateFrames();
-    void fillTestFrame(BufferDesc buff);
+    void fillTestFrame(const BufferDesc& buff);
 
     CameraDesc                  mDescription = {};  // The properties of this camera