diff --git a/src/x11/meta-x11-display.c b/src/x11/meta-x11-display.c
index 77fb091f6..6f31f237f 100644
--- a/src/x11/meta-x11-display.c
+++ b/src/x11/meta-x11-display.c
@@ -598,6 +598,7 @@ set_supported_hint (MetaX11Display *x11_display)
 
     x11_display->atom__GTK_FRAME_EXTENTS,
     x11_display->atom__GTK_SHOW_WINDOW_MENU,
+    x11_display->atom__GTK_EDGE_CONSTRAINTS,
   };
 
   XChangeProperty (x11_display->xdisplay,