diff --git a/main/source/particles/opengl.cpp b/main/source/particles/opengl.cpp
index 7e3739e9..2f48a566 100644
--- a/main/source/particles/opengl.cpp
+++ b/main/source/particles/opengl.cpp
@@ -11,7 +11,7 @@
 #include <windows.h>
 #endif
 
-#include <OpenGL/gl.h>
+#include <GL/gl.h>
 // XXX #include <iostream.h>
 
 // Emit OpenGL calls to draw the particles. These are drawn with