diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c
index d45c02d..30d8b85 100644
--- a/fs/dlm/plock.c
+++ b/fs/dlm/plock.c
@@ -412,7 +412,8 @@
 	.read    = dev_read,
 	.write   = dev_write,
 	.poll    = dev_poll,
-	.owner   = THIS_MODULE
+	.owner   = THIS_MODULE,
+	.llseek  = noop_llseek,
 };
 
 static struct miscdevice plock_dev_misc = {