diff --git a/src/osgSim/Impostor.cpp b/src/osgSim/Impostor.cpp
index e5c1bf4d9..357c1fd1b 100644
--- a/src/osgSim/Impostor.cpp
+++ b/src/osgSim/Impostor.cpp
@@ -11,7 +11,6 @@
  * OpenSceneGraph Public License for more details.
 */
 #include <osgSim/Impostor>
-#include <osgUtil/RenderToTextureStage>
 
 #include <algorithm>