diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 050e4ddbbb6516a20416cad7107695862f93f8cd..35dd0b86401a833624af552c5043585f8a1b5825 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -255,8 +255,8 @@ static const struct {
 	{ KDSIGACCEPT, KERN_INFO,  "KDSIGACCEPT" },
 };
 
-int line_ioctl(struct tty_struct *tty, struct file * file,
-	       unsigned int cmd, unsigned long arg)
+int line_ioctl(struct tty_struct *tty, unsigned int cmd,
+				unsigned long arg)
 {
 	int ret;
 	int i;
diff --git a/arch/um/include/shared/line.h b/arch/um/include/shared/line.h
index 311a0d3d93af2302224e9b9d6b76614643a23a67..72f4f25af2478e5c4d14d0a3072a45d10f21a211 100644
--- a/arch/um/include/shared/line.h
+++ b/arch/um/include/shared/line.h
@@ -77,8 +77,8 @@ extern int line_chars_in_buffer(struct tty_struct *tty);
 extern void line_flush_buffer(struct tty_struct *tty);
 extern void line_flush_chars(struct tty_struct *tty);
 extern int line_write_room(struct tty_struct *tty);
-extern int line_ioctl(struct tty_struct *tty, struct file * file,
-		      unsigned int cmd, unsigned long arg);
+extern int line_ioctl(struct tty_struct *tty, unsigned int cmd,
+				unsigned long arg);
 extern void line_throttle(struct tty_struct *tty);
 extern void line_unthrottle(struct tty_struct *tty);