diff -wbBur FreeMat-4.1-Source/libs/libGraphics/GLRenderEngine.cpp FreeMat-4.1-Source.my/libs/libGraphics/GLRenderEngine.cpp
--- FreeMat-4.1-Source/libs/libGraphics/GLRenderEngine.cpp	2011-11-27 04:27:43.000000000 +0400
+++ FreeMat-4.1-Source.my/libs/libGraphics/GLRenderEngine.cpp	2012-01-20 19:07:48.000000000 +0400
@@ -20,6 +20,7 @@
 #include <qimage.h>
 #include <qpainter.h>
 #include <QtOpenGL>
+#include <GL/glu.h>
 #include <math.h>
 #include "IEEEFP.hpp"