diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 58c961c..5c8473b 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -219,7 +219,8 @@
 
 struct tty_driver *alloc_tty_driver(int lines);
 void put_tty_driver(struct tty_driver *driver);
-void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
+void tty_set_operations(struct tty_driver *driver,
+			const struct tty_operations *op);
 
 /* tty driver magic number */
 #define TTY_DRIVER_MAGIC		0x5402