1 files changed, 1 insertions, 0 deletions
diff --git a/tmux.h b/tmux.h
index b315114e..83b6e4a8 100644
--- a/tmux.h
+++ b/tmux.h
@@ -2328,6 +2328,7 @@ struct winlink	*session_attach(struct session *, struct window *, int,
 		     char **);
 int		 session_detach(struct session *, struct winlink *);
 int		 session_has(struct session *, struct window *);
+int		 session_is_linked(struct session *, struct window *);
 int		 session_next(struct session *, int);
 int		 session_previous(struct session *, int);
 int		 session_select(struct session *, int);