1 files changed, 1 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 4e5e59598fd..eed57048871 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1326,6 +1326,7 @@ extern Lisp_Object Fwindow_at ();
 extern int window_internal_height (), window_internal_width ();
 
 /* defined in frame.c */
+extern Lisp_Object Qvisible;
 extern Lisp_Object Fframep ();
 extern Lisp_Object Fselect_frame ();
 extern Lisp_Object Ffocus_frame ();