diff --git a/pkg/api/validation/validation.go b/pkg/api/validation/validation.go
index f81e9845f8..966c5b71a5 100644
--- a/pkg/api/validation/validation.go
+++ b/pkg/api/validation/validation.go
@@ -1509,12 +1509,18 @@ func ValidateService(service *api.Service) field.ErrorList {
 
 	if service.Spec.Type == api.ServiceTypeLoadBalancer {
 		portsPath := specPath.Child("ports")
+		includeProtocols := sets.NewString()
 		for i := range service.Spec.Ports {
 			portPath := portsPath.Index(i)
 			if !supportedPortProtocols.Has(string(service.Spec.Ports[i].Protocol)) {
 				allErrs = append(allErrs, field.Invalid(portPath.Child("protocol"), service.Spec.Ports[i].Protocol, "cannot create an external load balancer with non-TCP/UDP ports"))
+			} else {
+				includeProtocols.Insert(string(service.Spec.Ports[i].Protocol))
 			}
 		}
+		if includeProtocols.Len() > 1 {
+			allErrs = append(allErrs, field.Invalid(portsPath, service.Spec.Ports, "cannot create an external load balancer with mix protocols"))
+		}
 	}
 
 	if service.Spec.Type == api.ServiceTypeClusterIP {
diff --git a/pkg/api/validation/validation_test.go b/pkg/api/validation/validation_test.go
index 69e02012e3..6eb0213455 100644
--- a/pkg/api/validation/validation_test.go
+++ b/pkg/api/validation/validation_test.go
@@ -2269,10 +2269,18 @@ func TestValidateService(t *testing.T) {
 			name: "valid load balancer protocol UDP 2",
 			tweakSvc: func(s *api.Service) {
 				s.Spec.Type = api.ServiceTypeLoadBalancer
-				s.Spec.Ports = append(s.Spec.Ports, api.ServicePort{Name: "q", Port: 12345, Protocol: "UDP", TargetPort: intstr.FromInt(12345)})
+				s.Spec.Ports[0] = api.ServicePort{Name: "q", Port: 12345, Protocol: "UDP", TargetPort: intstr.FromInt(12345)}
 			},
 			numErrs: 0,
 		},
+		{
+			name: "invalid load balancer with mix protocol",
+			tweakSvc: func(s *api.Service) {
+				s.Spec.Type = api.ServiceTypeLoadBalancer
+				s.Spec.Ports = append(s.Spec.Ports, api.ServicePort{Name: "q", Port: 12345, Protocol: "UDP", TargetPort: intstr.FromInt(12345)})
+			},
+			numErrs: 1,
+		},
 		{
 			name: "valid 1",
 			tweakSvc: func(s *api.Service) {