diff --git a/cmd/kubeadm/app/util/config/testdata/conversion/master/internal.yaml b/cmd/kubeadm/app/util/config/testdata/conversion/master/internal.yaml
index 9996fa33f24..3364c14fd6e 100644
--- a/cmd/kubeadm/app/util/config/testdata/conversion/master/internal.yaml
+++ b/cmd/kubeadm/app/util/config/testdata/conversion/master/internal.yaml
@@ -64,7 +64,7 @@ KubeProxy:
       minSyncPeriod: 0s
       syncPeriod: 30s
     ipvs:
-      ExcludeCIDRs: null
+      excludeCIDRs: null
       minSyncPeriod: 0s
       scheduler: ""
       syncPeriod: 30s
diff --git a/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1.yaml b/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1.yaml
index 75f36c4279f..1ad3415af1d 100644
--- a/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1.yaml
+++ b/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1.yaml
@@ -53,7 +53,7 @@ kubeProxy:
       minSyncPeriod: 0s
       syncPeriod: 30s
     ipvs:
-      ExcludeCIDRs: null
+      excludeCIDRs: null
       minSyncPeriod: 0s
       scheduler: ""
       syncPeriod: 30s
diff --git a/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1_without_TypeMeta.yaml b/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1_without_TypeMeta.yaml
index e8065236cae..dfaccd79534 100644
--- a/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1_without_TypeMeta.yaml
+++ b/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha1_without_TypeMeta.yaml
@@ -50,7 +50,7 @@ kubeProxy:
       minSyncPeriod: 0s
       syncPeriod: 30s
     ipvs:
-      ExcludeCIDRs: null
+      excludeCIDRs: null
       minSyncPeriod: 0s
       scheduler: ""
       syncPeriod: 30s
diff --git a/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha2.yaml b/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha2.yaml
index c83e9bc1471..f8af262b3fb 100644
--- a/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha2.yaml
+++ b/cmd/kubeadm/app/util/config/testdata/conversion/master/v1alpha2.yaml
@@ -54,7 +54,7 @@ kubeProxy:
       minSyncPeriod: 0s
       syncPeriod: 30s
     ipvs:
-      ExcludeCIDRs: null
+      excludeCIDRs: null
       minSyncPeriod: 0s
       scheduler: ""
       syncPeriod: 30s
diff --git a/cmd/kubeadm/app/util/config/testdata/defaulting/master/defaulted.yaml b/cmd/kubeadm/app/util/config/testdata/defaulting/master/defaulted.yaml
index 693080ec2d6..70ea5986e11 100644
--- a/cmd/kubeadm/app/util/config/testdata/defaulting/master/defaulted.yaml
+++ b/cmd/kubeadm/app/util/config/testdata/defaulting/master/defaulted.yaml
@@ -49,7 +49,7 @@ kubeProxy:
       minSyncPeriod: 0s
       syncPeriod: 30s
     ipvs:
-      ExcludeCIDRs: null
+      excludeCIDRs: null
       minSyncPeriod: 0s
       scheduler: ""
       syncPeriod: 30s
diff --git a/cmd/kubeadm/app/util/config/testdata/v1alpha1_upgrade/after.yaml b/cmd/kubeadm/app/util/config/testdata/v1alpha1_upgrade/after.yaml
index 045df0ad360..a08a94a5402 100644
--- a/cmd/kubeadm/app/util/config/testdata/v1alpha1_upgrade/after.yaml
+++ b/cmd/kubeadm/app/util/config/testdata/v1alpha1_upgrade/after.yaml
@@ -49,7 +49,7 @@ kubeProxy:
       minSyncPeriod: 0s
       syncPeriod: 30s
     ipvs:
-      ExcludeCIDRs: null
+      excludeCIDRs: null
       minSyncPeriod: 0s
       scheduler: ""
       syncPeriod: 30s
diff --git a/pkg/proxy/apis/kubeproxyconfig/v1alpha1/types.go b/pkg/proxy/apis/kubeproxyconfig/v1alpha1/types.go
index c9936e701f7..beab095d605 100644
--- a/pkg/proxy/apis/kubeproxyconfig/v1alpha1/types.go
+++ b/pkg/proxy/apis/kubeproxyconfig/v1alpha1/types.go
@@ -65,7 +65,7 @@ type KubeProxyIPVSConfiguration struct {
 	Scheduler string `json:"scheduler"`
 	// excludeCIDRs is a list of CIDR's which the ipvs proxier should not touch
 	// when cleaning up ipvs services.
-	ExcludeCIDRs []string
+	ExcludeCIDRs []string `json:"excludeCIDRs"`
 }
 
 // KubeProxyConntrackConfiguration contains conntrack settings for