diff --git a/src/core/screen.c b/src/core/screen.c
index c947f0e09..5efc65ac8 100644
--- a/src/core/screen.c
+++ b/src/core/screen.c
@@ -309,6 +309,8 @@ set_supported_hint (MetaScreen *screen)
 #include <meta/atomnames.h>
 #undef item
 #undef EWMH_ATOMS_ONLY
+
+    screen->display->atom__GTK_FRAME_EXTENTS,
   };
 
   XChangeProperty (screen->display->xdisplay, screen->xroot,