diff --git a/pkg/proxy/iptables/proxier.go b/pkg/proxy/iptables/proxier.go
index 3af1bc836e3..25e50f203d0 100644
--- a/pkg/proxy/iptables/proxier.go
+++ b/pkg/proxy/iptables/proxier.go
@@ -293,7 +293,7 @@ func NewProxier(ipt utiliptables.Interface,
 	var incorrectAddresses []string
 	nodePortAddresses, incorrectAddresses = utilproxy.FilterIncorrectCIDRVersion(nodePortAddresses, isIPv6)
 	if len(incorrectAddresses) > 0 {
-		klog.Warning("NodePortAddresses of wrong family; ", incorrectAddresses)
+		klog.Warningf("NodePortAddresses of wrong family; %s", incorrectAddresses)
 	}
 	proxier := &Proxier{
 		portsMap:                 make(map[utilproxy.LocalPort]utilproxy.Closeable),
diff --git a/pkg/proxy/ipvs/proxier.go b/pkg/proxy/ipvs/proxier.go
index 31933db0534..cadc0ee4fbc 100644
--- a/pkg/proxy/ipvs/proxier.go
+++ b/pkg/proxy/ipvs/proxier.go
@@ -448,7 +448,7 @@ func NewProxier(ipt utiliptables.Interface,
 	var incorrectAddresses []string
 	nodePortAddresses, incorrectAddresses = utilproxy.FilterIncorrectCIDRVersion(nodePortAddresses, isIPv6)
 	if len(incorrectAddresses) > 0 {
-		klog.Warning("NodePortAddresses of wrong family; ", incorrectAddresses)
+		klog.Warningf("NodePortAddresses of wrong family; %s", incorrectAddresses)
 	}
 	proxier := &Proxier{
 		portsMap:              make(map[utilproxy.LocalPort]utilproxy.Closeable),