diff --git a/include/osg/GLExtensions b/include/osg/GLExtensions
index 7e986f836..7230ddc85 100644
--- a/include/osg/GLExtensions
+++ b/include/osg/GLExtensions
@@ -61,7 +61,7 @@ inline void* getGLExtensionFuncPtr(const char *funcName)
     } else
 	return NULL;
 
-#elif defined (__sun)
+#elif defined (__sun) || defined (__sgi)
 
      static void *handle = dlopen((const char *)0L, RTLD_LAZY);
      return dlsym(handle, funcName);