diff --git a/examples/OpenGLWindow/SimpleOpenGL2Renderer.cpp b/examples/OpenGLWindow/SimpleOpenGL2Renderer.cpp
index c3ddb02f7..81aee4e8f 100644
--- a/examples/OpenGLWindow/SimpleOpenGL2Renderer.cpp
+++ b/examples/OpenGLWindow/SimpleOpenGL2Renderer.cpp
@@ -134,7 +134,7 @@ void SimpleOpenGL2Renderer::writeSingleInstanceScaleToCPU(double* scale, int src
 
 int SimpleOpenGL2Renderer::getTotalNumInstances() const
 {
-    return 0;
+    return m_data->m_graphicsInstances.size();
 }
 
 void	SimpleOpenGL2Renderer::getCameraViewMatrix(float viewMat[16]) const