diff --git a/examples/CommonInterfaces/CommonGUIHelperInterface.h b/examples/CommonInterfaces/CommonGUIHelperInterface.h
index a5121548e..24b4a301c 100644
--- a/examples/CommonInterfaces/CommonGUIHelperInterface.h
+++ b/examples/CommonInterfaces/CommonGUIHelperInterface.h
@@ -84,8 +84,8 @@ struct GUIHelperInterface
 
 	virtual void autogenerateGraphicsObjects(btDiscreteDynamicsWorld* rbWorld) =0;
 	
-	virtual void drawText3D( const char* txt, float posX, float posY, float posZ, float size)=0;
-	virtual void drawText3D( const char* txt, float position[3], float orientation[4], float color[4], float size, int optionFlag)=0;
+	virtual void drawText3D( const char* txt, float posX, float posY, float posZ, float size){}
+	virtual void drawText3D( const char* txt, float position[3], float orientation[4], float color[4], float size, int optionFlag){}
 	
 	virtual int		addUserDebugText3D( const char* txt, const double positionXYZ[3], const double orientation[4], const double	textColorRGB[3], double size, double lifeTime, int trackingVisualShapeIndex, int optionFlags){return -1;}
 	virtual int		addUserDebugLine(const double	debugLineFromXYZ[3], const double	debugLineToXYZ[3], const double	debugLineColorRGB[3], double lineWidth, double lifeTime , int trackingVisualShapeIndex){return -1;};