1 files changed, 1 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index 194d01d8..dbea85bf 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1540,7 +1540,7 @@ extern struct client *cfg_client;
 void		 start_cfg(void);
 int		 load_cfg(const char *, struct cmd_q *, char **);
 void		 set_cfg_file(const char *);
-void		 cfg_add_cause(const char *, ...);
+void printflike(1, 2) cfg_add_cause(const char *, ...);
 void		 cfg_print_causes(struct cmd_q *);
 void		 cfg_show_causes(struct session *);