diff --git a/net/rds/rds.h b/net/rds/rds.h
index b57cb50..c22bd7b 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -301,6 +301,8 @@
 	 *   -> rs->rs_lock
 	 */
 	spinlock_t		m_rs_lock;
+	wait_queue_head_t	m_flush_wait;
+
 	struct rds_sock		*m_rs;
 
 	/* cookie to send to remote, in rds header */