diff --git a/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx b/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
index b7eb9151e1..b116638c2b 100755
--- a/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
+++ b/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
@@ -61,7 +61,6 @@
 #include "pStatTimer.h"
 #include "pStatCollector.h"
 
-#include <d3dx9.h>
 #include <mmsystem.h>