diff --git a/examples/CommonInterfaces/CommonGUIHelperInterface.h b/examples/CommonInterfaces/CommonGUIHelperInterface.h
index 916a82343..a9e273f02 100644
--- a/examples/CommonInterfaces/CommonGUIHelperInterface.h
+++ b/examples/CommonInterfaces/CommonGUIHelperInterface.h
@@ -94,8 +94,8 @@ struct GUIHelperInterface
                                   int* segmentationMaskBuffer, int segmentationMaskBufferSizeInPixels,
 		  int startPixelIndex, int destinationWidth, int destinationHeight, int* numPixelsCopied){}
 
-	virtual void setProjectiveTextureMatrices(const float viewMatrix[16], const float projectionMatrix[16])=0;
-	virtual void setProjectiveTexture(bool useProjectiveTexture)=0;
+	virtual void setProjectiveTextureMatrices(const float viewMatrix[16], const float projectionMatrix[16]){}
+	virtual void setProjectiveTexture(bool useProjectiveTexture){}
 
 	virtual void autogenerateGraphicsObjects(btDiscreteDynamicsWorld* rbWorld) =0;