diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 9f0ef54..799782c 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -112,6 +112,7 @@
 	bool wakeup_pending;
 	u16 chain_sz;
 	u16 chain_imp;
+	u16 ackers;
 };
 
 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))