--- qwtplot3d/include/qwt3d_openglhelper.h	2005-07-20 01:40:28.000000000 +1000
+++ qwtplot3d-patched/include/qwt3d_openglhelper.h	2015-04-29 11:37:38.567622402 +1000
@@ -5,6 +5,7 @@
 #if QT_VERSION < 0x040000
 #include <qgl.h>
 #else
+#include <GL/glu.h>
 #include <QtOpenGL/qgl.h>
 #endif
 
