1 files changed, 0 insertions, 1 deletions

diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 13a86bd383d3..8f602667296d 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -137,7 +137,6 @@ extern int os_new_tty_pgrp(int fd, int pid);
 extern int os_get_ifname(int fd, char *namebuf);
 extern int os_set_slip(int fd);
 extern int os_set_owner(int fd, int pid);
-extern int os_sigio_async(int master, int slave);
 extern int os_mode_fd(int fd, int mode);
 
 extern int os_seek_file(int fd, __u64 offset);