1 files changed, 0 insertions, 1 deletions

diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 930b261ea483..bb6b7d9e1888 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -134,7 +134,6 @@ extern void os_print_error(int error, const char* str);
 extern int os_get_exec_close(int fd, int *close_on_exec);
 extern int os_set_exec_close(int fd, int close_on_exec);
 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
-extern int os_window_size(int fd, int *rows, int *cols);
 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);