diff --git a/pkg/inject/sidecar.go b/pkg/inject/sidecar.go
index ce9d0a02e1..ceeed7ca1e 100644
--- a/pkg/inject/sidecar.go
+++ b/pkg/inject/sidecar.go
@@ -159,6 +159,7 @@ func container(jaeger *v1.Jaeger, dep *appsv1.Deployment) corev1.Container {
 			{
 				ContainerPort: zkCompactTrft,
 				Name:          "zk-compact-trft",
+				Protocol:      corev1.ProtocolUDP,
 			},
 			{
 				ContainerPort: configRest,
@@ -167,10 +168,12 @@ func container(jaeger *v1.Jaeger, dep *appsv1.Deployment) corev1.Container {
 			{
 				ContainerPort: jgCompactTrft,
 				Name:          "jg-compact-trft",
+				Protocol:      corev1.ProtocolUDP,
 			},
 			{
 				ContainerPort: jgBinaryTrft,
 				Name:          "jg-binary-trft",
+				Protocol:      corev1.ProtocolUDP,
 			},
 		},
 		Resources: commonSpec.Resources,
diff --git a/pkg/inject/sidecar_test.go b/pkg/inject/sidecar_test.go
index 33492df73d..1b449f458d 100644
--- a/pkg/inject/sidecar_test.go
+++ b/pkg/inject/sidecar_test.go
@@ -161,6 +161,25 @@ func TestInjectSidecarWithEnvVarsOverridePropagation(t *testing.T) {
 	assert.Contains(t, dep.Spec.Template.Spec.Containers[0].Env, corev1.EnvVar{Name: envVarServiceName, Value: "testapp.default"})
 }
 
+func TestSidecarDefaultPorts(t *testing.T) {
+	// prepare
+	jaeger := v1.NewJaeger(types.NamespacedName{Name: "TestSidecarPorts"})
+	dep := dep(map[string]string{Annotation: jaeger.Name}, map[string]string{"app": "testapp"})
+
+	// test
+	dep = Sidecar(jaeger, dep)
+
+	// verify
+	assert.Len(t, dep.Spec.Template.Spec.Containers, 2)
+	assert.Contains(t, dep.Spec.Template.Spec.Containers[1].Image, "jaeger-agent")
+
+	assert.Len(t, dep.Spec.Template.Spec.Containers[1].Ports, 4)
+	assert.Contains(t, dep.Spec.Template.Spec.Containers[1].Ports, corev1.ContainerPort{ContainerPort: 5775, Name: "zk-compact-trft", Protocol: corev1.ProtocolUDP})
+	assert.Contains(t, dep.Spec.Template.Spec.Containers[1].Ports, corev1.ContainerPort{ContainerPort: 5778, Name: "config-rest"})
+	assert.Contains(t, dep.Spec.Template.Spec.Containers[1].Ports, corev1.ContainerPort{ContainerPort: 6831, Name: "jg-compact-trft", Protocol: corev1.ProtocolUDP})
+	assert.Contains(t, dep.Spec.Template.Spec.Containers[1].Ports, corev1.ContainerPort{ContainerPort: 6832, Name: "jg-binary-trft",  Protocol: corev1.ProtocolUDP})
+}
+
 func TestSkipInjectSidecar(t *testing.T) {
 	// prepare
 	jaeger := v1.NewJaeger(types.NamespacedName{Name: "TestSkipInjectSidecar"})
diff --git a/pkg/service/agent_test.go b/pkg/service/agent_test.go
index 9345a9ef99..100db2fde2 100644
--- a/pkg/service/agent_test.go
+++ b/pkg/service/agent_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/types"
 
 	v1 "github.com/jaegertracing/jaeger-operator/pkg/apis/jaegertracing/v1"
@@ -26,6 +27,13 @@ func TestAgentServiceNameAndPorts(t *testing.T) {
 
 	for _, port := range svc.Spec.Ports {
 		ports[port.Port] = true
+		switch port.Port {
+		case
+			5775,
+			6831,
+			6832:
+				assert.Equal(t, port.Protocol, corev1.ProtocolUDP, "Expected port %v to be UDP, but wasn't", port)
+		}
 	}
 
 	for k, v := range ports {