diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index d70a6e6..7689b50 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -759,7 +759,7 @@
 	return newpos;
 }
 
-static struct file_operations ur_fops = {
+static const struct file_operations ur_fops = {
 	.owner	 = THIS_MODULE,
 	.open	 = ur_open,
 	.release = ur_release,