diff --git a/caribou/libcaribou/xadapter.vala b/caribou/libcaribou/xadapter.vala

index d22e2d4..769d8d1 100644

--- a/caribou/libcaribou/xadapter.vala

+++ b/caribou/libcaribou/xadapter.vala

@@ -181,6 +181,10 @@ namespace Caribou {

             Gdk.Keymap kmap= Gdk.Keymap.get_default ();

             Gdk.KeymapKey[] kmk;

+	    if (keyval == 0x07c) {

+		return false;

+	    }

+

             if (!kmap.get_entries_for_keyval (keyval, out kmk))

                 return false;