diff --git a/Demos/OpenGL/DemoApplication.h b/Demos/OpenGL/DemoApplication.h
index 4fc33f02f..d00a32bf9 100644
--- a/Demos/OpenGL/DemoApplication.h
+++ b/Demos/OpenGL/DemoApplication.h
@@ -38,7 +38,7 @@ subject to the following restrictions:
 #include "LinearMath/btVector3.h"
 #include "LinearMath/btMatrix3x3.h"
 #include "LinearMath/btTransform.h"
-#include "LinearMath/btQuickProf.h"
+#include "LinearMath/btQuickprof.h"
 
 class	btCollisionShape;
 class	btDynamicsWorld;