diff --git a/net/tipc/topsrv.c b/net/tipc/topsrv.c
index 5f704c76827b043a5937d98c706cd5b94f2f03fc..d6d7adee0466c7b2f5317c6a4d8c13c133645db2 100644
--- a/net/tipc/topsrv.c
+++ b/net/tipc/topsrv.c
@@ -577,7 +577,7 @@ bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type, u32 lower,
 	sub.seq.upper = upper;
 	sub.timeout = TIPC_WAIT_FOREVER;
 	sub.filter = filter;
-	*(u32 *)&sub.usr_handle = port;
+	*(u64 *)&sub.usr_handle = (u64)port;
 
 	con = tipc_conn_alloc(tipc_topsrv(net), NULL);
 	if (IS_ERR(con))