diff --git a/pkg/controller/service/BUILD b/pkg/controller/service/BUILD
index 4654d37151b..7dc61692236 100644
--- a/pkg/controller/service/BUILD
+++ b/pkg/controller/service/BUILD
@@ -59,6 +59,7 @@ go_test(
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/util/intstr:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/client-go/informers:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
diff --git a/pkg/controller/service/service_controller.go b/pkg/controller/service/service_controller.go
index f3ba02c01c4..bd70b39876b 100644
--- a/pkg/controller/service/service_controller.go
+++ b/pkg/controller/service/service_controller.go
@@ -565,8 +565,9 @@ func portEqualForLB(x, y *v1.ServicePort) bool {
 		return false
 	}
 
-	// We don't check TargetPort; that is not relevant for load balancing
-	// TODO: Should we blank it out?  Or just check it anyway?
+	if x.TargetPort != y.TargetPort {
+		return false
+	}
 
 	return true
 }
diff --git a/pkg/controller/service/service_controller_test.go b/pkg/controller/service/service_controller_test.go
index e3912cfc700..70e588c9df5 100644
--- a/pkg/controller/service/service_controller_test.go
+++ b/pkg/controller/service/service_controller_test.go
@@ -25,12 +25,13 @@ import (
 	"testing"
 	"time"
 
-	v1 "k8s.io/api/core/v1"
+	"k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/intstr"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
@@ -985,6 +986,50 @@ func TestNeedsUpdate(t *testing.T) {
 			},
 			expectedNeedsUpdate: true,
 		},
+		{
+			testName: "If TargetGroup is different 1",
+			updateFn: func() {
+				oldSvc = &v1.Service{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      "tcp-service",
+						Namespace: "default",
+					},
+					Spec: v1.ServiceSpec{
+						Ports: []v1.ServicePort{{
+							Port:       80,
+							Protocol:   v1.ProtocolTCP,
+							TargetPort: intstr.Parse("20"),
+						}},
+						Type: v1.ServiceTypeLoadBalancer,
+					},
+				}
+				newSvc = oldSvc.DeepCopy()
+				newSvc.Spec.Ports[0].TargetPort = intstr.Parse("21")
+			},
+			expectedNeedsUpdate: true,
+		},
+		{
+			testName: "If TargetGroup is different 2",
+			updateFn: func() {
+				oldSvc = &v1.Service{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      "tcp-service",
+						Namespace: "default",
+					},
+					Spec: v1.ServiceSpec{
+						Ports: []v1.ServicePort{{
+							Port:       80,
+							Protocol:   v1.ProtocolTCP,
+							TargetPort: intstr.Parse("22"),
+						}},
+						Type: v1.ServiceTypeLoadBalancer,
+					},
+				}
+				newSvc = oldSvc.DeepCopy()
+				newSvc.Spec.Ports[0].TargetPort = intstr.Parse("dns")
+			},
+			expectedNeedsUpdate: true,
+		},
 	}
 
 	controller, _, _ := newController()