diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index d0c2d732dcff..b8c80d28df41 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -29,7 +29,7 @@ static int
 dasd_ioctl_api_version(void __user *argp)
 {
 	int ver = DASD_API_VERSION;
-	return put_user(ver, (int *)argp);
+	return put_user(ver, (int __user *)argp);
 }
 
 /*