diff --git a/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/v1alpha1.yaml b/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/v1alpha1.yaml
index 6820773d7b3e..de3017305a11 100644
--- a/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/v1alpha1.yaml
+++ b/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/v1alpha1.yaml
@@ -21,7 +21,7 @@ hostnameOverride: ""
 iptables:
   masqueradeAll: false
   masqueradeBit: 14
-  minSyncPeriod: 0s
+  minSyncPeriod: 1s
   syncPeriod: 30s
 ipvs:
   excludeCIDRs: null
diff --git a/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/roundtrip/default/v1alpha1.yaml b/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/roundtrip/default/v1alpha1.yaml
index 6820773d7b3e..de3017305a11 100644
--- a/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/roundtrip/default/v1alpha1.yaml
+++ b/pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/roundtrip/default/v1alpha1.yaml
@@ -21,7 +21,7 @@ hostnameOverride: ""
 iptables:
   masqueradeAll: false
   masqueradeBit: 14
-  minSyncPeriod: 0s
+  minSyncPeriod: 1s
   syncPeriod: 30s
 ipvs:
   excludeCIDRs: null
diff --git a/pkg/proxy/apis/config/v1alpha1/defaults.go b/pkg/proxy/apis/config/v1alpha1/defaults.go
index a80f94313a6a..4831809bb0d3 100644
--- a/pkg/proxy/apis/config/v1alpha1/defaults.go
+++ b/pkg/proxy/apis/config/v1alpha1/defaults.go
@@ -61,6 +61,9 @@ func SetDefaults_KubeProxyConfiguration(obj *kubeproxyconfigv1alpha1.KubeProxyCo
 	if obj.IPTables.SyncPeriod.Duration == 0 {
 		obj.IPTables.SyncPeriod = metav1.Duration{Duration: 30 * time.Second}
 	}
+	if obj.IPTables.MinSyncPeriod.Duration == 0 {
+		obj.IPTables.MinSyncPeriod = metav1.Duration{Duration: 1 * time.Second}
+	}
 	if obj.IPVS.SyncPeriod.Duration == 0 {
 		obj.IPVS.SyncPeriod = metav1.Duration{Duration: 30 * time.Second}
 	}