diff --git a/RenderSystems/GLSupport/src/GLX/OgreGLXGLSupport.cpp b/RenderSystems/GLSupport/src/GLX/OgreGLXGLSupport.cpp
index bae11049c8f..3f6ea979488 100644
--- a/RenderSystems/GLSupport/src/GLX/OgreGLXGLSupport.cpp
+++ b/RenderSystems/GLSupport/src/GLX/OgreGLXGLSupport.cpp
@@ -306,6 +306,9 @@ namespace Ogre
 
     GLXFBConfig GLXGLSupport::getFBConfigFromVisualID(VisualID visualid)
     {
+        PFNGLXGETFBCONFIGFROMVISUALSGIXPROC glXGetFBConfigFromVisualSGIX = 
+            (PFNGLXGETFBCONFIGFROMVISUALSGIXPROC)getProcAddress("glXGetFBConfigFromVisualSGIX");
+
         GLXFBConfig fbConfig = 0;
 
         XVisualInfo visualInfo;