diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index 68c0f3e..88559e5 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -6875,6 +6875,8 @@
 	}
 	else if (shape < sizeof(mshape_ids) / sizeof(int))
 	    id = mshape_ids[shape];
+	else
+	    return;
 # ifdef HAVE_GTK_MULTIHEAD
 	c = gdk_cursor_new_for_display(
 		gtk_widget_get_display(gui.drawarea), (GdkCursorType)id);