diff --git a/GL/glx/glxscreens.c b/GL/glx/glxscreens.c
index 9f63bf0bb..23f58e2bf 100644
--- a/GL/glx/glxscreens.c
+++ b/GL/glx/glxscreens.c
@@ -142,6 +142,7 @@ static char GLXServerExtensions[] =
                         "GLX_SGIX_swap_barrier "
 #endif
 			"GLX_SGIX_fbconfig "
+                        "GLX_EXT_texture_from_drawable "
 			;
 
 __GLXscreenInfo *__glXActiveScreens;