1 files changed, 1 insertions, 1 deletions

diff --git a/arch/um/include/chan_kern.h b/arch/um/include/chan_kern.h
index 9003a343e148..2d9aa7ef4c27 100644
--- a/arch/um/include/chan_kern.h
+++ b/arch/um/include/chan_kern.h
@@ -30,7 +30,7 @@ struct chan {
 extern void chan_interrupt(struct list_head *chans, struct delayed_work *task,
                            struct tty_struct *tty, int irq);
 extern int parse_chan_pair(char *str, struct line *line, int device,
-                           const struct chan_opts *opts);
+                           const struct chan_opts *opts, char **error_out);
 extern int open_chan(struct list_head *chans);
 extern int write_chan(struct list_head *chans, const char *buf, int len,
                              int write_irq);