diff --git a/net/ceph/auth_x.h b/net/ceph/auth_x.h
index 40b1a3c..21a5af9 100644
--- a/net/ceph/auth_x.h
+++ b/net/ceph/auth_x.h
@@ -26,6 +26,7 @@
 
 
 struct ceph_x_authorizer {
+	struct ceph_authorizer base;
 	struct ceph_crypto_key session_key;
 	struct ceph_buffer *buf;
 	unsigned int service;