--- SyntopiaCore/GLEngine/Sphere.h~	2010-08-11 15:12:22.000000000 +0200
+++ SyntopiaCore/GLEngine/Sphere.h	2012-06-04 12:14:57.496630463 +0200
@@ -2,6 +2,7 @@
 
 #include "SyntopiaCore/Math/Vector3.h"
 #include "Object3D.h"
+#include <GL/glu.h>
 
 namespace SyntopiaCore {
 	namespace GLEngine {	
--- SyntopiaCore/GLEngine/Raytracer/RayTracer.cpp~	2010-11-13 22:32:44.000000000 +0100
+++ SyntopiaCore/GLEngine/Raytracer/RayTracer.cpp	2012-06-04 12:19:09.459453909 +0200
@@ -1,5 +1,5 @@
 #include <QThread>
-
+#include <GL/glu.h>
 
 #include "RayTracer.h"