diff --git a/fs/ceph/messenger.h b/fs/ceph/messenger.h
index eff5cb5..e04c214 100644
--- a/fs/ceph/messenger.h
+++ b/fs/ceph/messenger.h
@@ -254,4 +254,6 @@
 	kref_put(&msg->kref, ceph_msg_last_put);
 }
 
+extern void ceph_msg_dump(struct ceph_msg *msg);
+
 #endif