diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index 3a1a958..8df7b13 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -547,7 +547,7 @@
 	return 0;
 }
 
-static struct file_operations mon_fops = {
+static const struct file_operations mon_fops = {
 	.owner   = THIS_MODULE,
 	.open    = &mon_open,
 	.release = &mon_close,