1 files changed, 8 insertions, 1 deletions

diff --git a/src/xterm.h b/src/xterm.h
index 28749dee0be..5e3f6d9f896 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -508,9 +508,16 @@ struct x_output
 #define FRAME_DEFAULT_FACE(f) ((f)->output_data.x->computed_faces[0])
 #define FRAME_MODE_LINE_FACE(f) ((f)->output_data.x->computed_faces[1])
 
-/* Return the window associated with the frame F.  */
+/* Return the X window used for displaying data in frame F.  */
 #define FRAME_X_WINDOW(f) ((f)->output_data.x->window_desc)
 
+/* Return the outermost X window associated with the frame F.  */
+#ifdef USE_X_TOOLKIT
+#define FRAME_OUTER_WINDOW(f) (XtWindow ((f)->output_data.x->widget))
+#else
+#define FRAME_OUTER_WINDOW(f) (FRAME_X_WINDOW (f))
+#endif
+
 #define FRAME_FOREGROUND_PIXEL(f) ((f)->output_data.x->foreground_pixel)
 #define FRAME_BACKGROUND_PIXEL(f) ((f)->output_data.x->background_pixel)
 #define FRAME_FONT(f) ((f)->output_data.x->font)