1 files changed, 1 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index 08650d51..be8f296c 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1927,7 +1927,7 @@ struct window_pane *window_pane_next_by_number(struct window *,
 		        struct window_pane *, u_int);
 struct window_pane *window_pane_previous_by_number(struct window *,
 		        struct window_pane *, u_int);
-u_int		 window_pane_index(struct window *, struct window_pane *);
+int		 window_pane_index(struct window_pane *, u_int *);
 u_int		 window_count_panes(struct window *);
 void		 window_destroy_panes(struct window *);
 struct window_pane *window_pane_find_by_id(u_int);