diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 2a2a8363ca16b587aa02a36a2849504fa5dfec9e..d1b7298e58945308089e87ed9a4ce120f18e1958 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -392,7 +392,7 @@ void ip_vs_sync_switch_mode(struct net *net, int mode)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
-	if (!ipvs->sync_state & IP_VS_STATE_MASTER)
+	if (!(ipvs->sync_state & IP_VS_STATE_MASTER))
 		return;
 	if (mode == ipvs->sysctl_sync_ver || !ipvs->sync_buff)
 		return;