diff --git a/pkg/proxy/iptables/proxier.go b/pkg/proxy/iptables/proxier.go
index a3946d83c4c..1678ed9902e 100644
--- a/pkg/proxy/iptables/proxier.go
+++ b/pkg/proxy/iptables/proxier.go
@@ -297,7 +297,7 @@ func NewProxier(ipt utiliptables.Interface,
 	var incorrectAddresses []string
 	nodePortAddresses, incorrectAddresses = utilproxy.FilterIncorrectCIDRVersion(nodePortAddresses, ipFamily)
 	if len(incorrectAddresses) > 0 {
-		klog.Warning("NodePortAddresses of wrong family; ", incorrectAddresses)
+		klog.Warningf("NodePortAddresses of wrong family; %s", incorrectAddresses)
 	}
 
 	proxier := &Proxier{
diff --git a/pkg/proxy/ipvs/proxier.go b/pkg/proxy/ipvs/proxier.go
index a34b181640d..7d67008332c 100644
--- a/pkg/proxy/ipvs/proxier.go
+++ b/pkg/proxy/ipvs/proxier.go
@@ -453,7 +453,7 @@ func NewProxier(ipt utiliptables.Interface,
 	var incorrectAddresses []string
 	nodePortAddresses, incorrectAddresses = utilproxy.FilterIncorrectCIDRVersion(nodePortAddresses, ipFamily)
 	if len(incorrectAddresses) > 0 {
-		klog.Warning("NodePortAddresses of wrong family; ", incorrectAddresses)
+		klog.Warningf("NodePortAddresses of wrong family; %s", incorrectAddresses)
 	}
 	proxier := &Proxier{
 		ipFamily:              ipFamily,