diff --git a/pkg/controller/nodeipam/ipam/cidr_allocator.go b/pkg/controller/nodeipam/ipam/cidr_allocator.go
index 10f0dce5a44..b53bee83fc6 100644
--- a/pkg/controller/nodeipam/ipam/cidr_allocator.go
+++ b/pkg/controller/nodeipam/ipam/cidr_allocator.go
@@ -22,6 +22,8 @@ import (
 	"net"
 	"time"
 
+	"k8s.io/kubernetes/pkg/controller/nodeipam/ipam/cidrset"
+
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/fields"
@@ -160,3 +162,14 @@ func ipnetToStringList(inCIDRs []*net.IPNet) []string {
 	}
 	return outCIDRs
 }
+
+// occupyServiceCIDR removes the service CIDR range from the cluster CIDR if it
+// intersects.
+func occupyServiceCIDR(set *cidrset.CidrSet, clusterCIDR, serviceCIDR *net.IPNet) error {
+	if clusterCIDR.Contains(serviceCIDR.IP) || serviceCIDR.Contains(clusterCIDR.IP) {
+		if err := set.Occupy(serviceCIDR); err != nil {
+			return err
+		}
+	}
+	return nil
+}
diff --git a/pkg/controller/nodeipam/ipam/controller_legacyprovider.go b/pkg/controller/nodeipam/ipam/controller_legacyprovider.go
index bdf318b8d59..7b8179f492f 100644
--- a/pkg/controller/nodeipam/ipam/controller_legacyprovider.go
+++ b/pkg/controller/nodeipam/ipam/controller_legacyprovider.go
@@ -165,17 +165,6 @@ func (c *Controller) Run(ctx context.Context) {
 	<-ctx.Done()
 }
 
-// occupyServiceCIDR removes the service CIDR range from the cluster CIDR if it
-// intersects.
-func occupyServiceCIDR(set *cidrset.CidrSet, clusterCIDR, serviceCIDR *net.IPNet) error {
-	if clusterCIDR.Contains(serviceCIDR.IP) || serviceCIDR.Contains(clusterCIDR.IP) {
-		if err := set.Occupy(serviceCIDR); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 type nodeState struct {
 	t Timeout
 }
diff --git a/pkg/controller/nodeipam/ipam/controller_test.go b/pkg/controller/nodeipam/ipam/controller_test.go
index 791856082c5..6e5a6f99571 100644
--- a/pkg/controller/nodeipam/ipam/controller_test.go
+++ b/pkg/controller/nodeipam/ipam/controller_test.go
@@ -1,6 +1,3 @@
-//go:build !providerless
-// +build !providerless
-
 /*
 Copyright 2017 The Kubernetes Authors.