Index: ParaView-v4.2.0-RC1-source/VTK/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx
===================================================================
--- ParaView-v4.2.0-RC1-source.orig/VTK/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx
+++ ParaView-v4.2.0-RC1-source/VTK/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx
@@ -26,7 +26,7 @@
 
 // define GLX_GLXEXT_LEGACY to prevent glx.h to include glxext.h provided by
 // the system
-//#define GLX_GLXEXT_LEGACY
+#define GLX_GLXEXT_LEGACY
 #include "GL/glx.h"
 
 #include "vtkgl.h"