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-rw-r--r--src/gtkutil.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/gtkutil.h b/src/gtkutil.h
index 31a12cd5d3c..95dd75b7fad 100644
--- a/src/gtkutil.h
+++ b/src/gtkutil.h
@@ -192,6 +192,10 @@ extern Lisp_Object xg_get_page_setup (void);
extern void xg_print_frames_dialog (Lisp_Object);
#endif
+#if defined HAVE_GTK3 && defined HAVE_XINPUT2
+extern bool xg_is_menu_window (Display *dpy, Window);
+#endif
+
/* Mark all callback data that are Lisp_object:s during GC. */
extern void xg_mark_data (void);