diff --git a/openstack/identity/v3/services/requests.go b/openstack/identity/v3/services/requests.go
index 7b1a250..fa55d06 100644
--- a/openstack/identity/v3/services/requests.go
+++ b/openstack/identity/v3/services/requests.go
@@ -8,16 +8,16 @@
 	"github.com/rackspace/gophercloud/openstack/utils"
 )
 
+type response struct {
+	Service ServiceResult `json:"service"`
+}
+
 // Create adds a new service of the requested type to the catalog.
 func Create(client *gophercloud.ServiceClient, serviceType string) (*ServiceResult, error) {
 	type request struct {
 		Type string `json:"type"`
 	}
 
-	type response struct {
-		Service ServiceResult `json:"service"`
-	}
-
 	req := request{Type: serviceType}
 	var resp response
 
@@ -70,10 +70,6 @@
 
 // Info returns additional information about a service, given its ID.
 func Info(client *gophercloud.ServiceClient, serviceID string) (*ServiceResult, error) {
-	type response struct {
-		Service ServiceResult `json:"service"`
-	}
-
 	var resp response
 	_, err := perigee.Request("GET", getServiceURL(client, serviceID), perigee.Options{
 		MoreHeaders: client.Provider.AuthenticatedHeaders(),
@@ -85,3 +81,25 @@
 	}
 	return &resp.Service, nil
 }
+
+// Update changes the service type of an existing service.s
+func Update(client *gophercloud.ServiceClient, serviceID string, serviceType string) (*ServiceResult, error) {
+	type request struct {
+		Type string `json:"type"`
+	}
+
+	req := request{Type: serviceType}
+
+	var resp response
+	_, err := perigee.Request("PATCH", getServiceURL(client, serviceID), perigee.Options{
+		MoreHeaders: client.Provider.AuthenticatedHeaders(),
+		ReqBody:     &req,
+		Results:     &resp,
+		OkCodes:     []int{200},
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return &resp.Service, nil
+}
diff --git a/openstack/identity/v3/services/requests_test.go b/openstack/identity/v3/services/requests_test.go
index 1d30540..b2249e6 100644
--- a/openstack/identity/v3/services/requests_test.go
+++ b/openstack/identity/v3/services/requests_test.go
@@ -9,13 +9,24 @@
 	"github.com/rackspace/gophercloud/testhelper"
 )
 
+const tokenID = "111111"
+
+func serviceClient() *gophercloud.ServiceClient {
+	return &gophercloud.ServiceClient{
+		Provider: &gophercloud.ProviderClient{
+			TokenID: tokenID,
+		},
+		Endpoint: testhelper.Endpoint(),
+	}
+}
+
 func TestCreateSuccessful(t *testing.T) {
 	testhelper.SetupHTTP()
 	defer testhelper.TeardownHTTP()
 
 	testhelper.Mux.HandleFunc("/services", func(w http.ResponseWriter, r *http.Request) {
 		testhelper.TestMethod(t, r, "POST")
-		testhelper.TestHeader(t, r, "X-Auth-Token", "1111")
+		testhelper.TestHeader(t, r, "X-Auth-Token", tokenID)
 		testhelper.TestJSONRequest(t, r, `{ "type": "compute" }`)
 
 		w.Header().Add("Content-Type", "application/json")
@@ -30,14 +41,9 @@
     }`)
 	})
 
-	client := gophercloud.ServiceClient{
-		Provider: &gophercloud.ProviderClient{
-			TokenID: "1111",
-		},
-		Endpoint: testhelper.Endpoint(),
-	}
+	client := serviceClient()
 
-	result, err := Create(&client, "compute")
+	result, err := Create(client, "compute")
 	if err != nil {
 		t.Fatalf("Unexpected error from Create: %v", err)
 	}
@@ -62,7 +68,7 @@
 
 	testhelper.Mux.HandleFunc("/services", func(w http.ResponseWriter, r *http.Request) {
 		testhelper.TestMethod(t, r, "GET")
-		testhelper.TestHeader(t, r, "X-Auth-Token", "1111")
+		testhelper.TestHeader(t, r, "X-Auth-Token", tokenID)
 
 		w.Header().Add("Content-Type", "application/json")
 		fmt.Fprintf(w, `
@@ -89,14 +95,9 @@
 		`)
 	})
 
-	client := gophercloud.ServiceClient{
-		Provider: &gophercloud.ProviderClient{
-			TokenID: "1111",
-		},
-		Endpoint: testhelper.Endpoint(),
-	}
+	client := serviceClient()
 
-	result, err := List(&client, ListOpts{})
+	result, err := List(client, ListOpts{})
 	if err != nil {
 		t.Fatalf("Error listing services: %v", err)
 	}
@@ -124,14 +125,14 @@
 
 	testhelper.Mux.HandleFunc("/services/12345", func(w http.ResponseWriter, r *http.Request) {
 		testhelper.TestMethod(t, r, "GET")
-		testhelper.TestHeader(t, r, "X-Auth-Token", "1111")
+		testhelper.TestHeader(t, r, "X-Auth-Token", tokenID)
 
 		w.Header().Add("Content-Type", "application/json")
 		fmt.Fprintf(w, `
 			{
 				"service": {
 						"description": "Service One",
-						"id": "1234",
+						"id": "12345",
 						"name": "service-one",
 						"type": "identity"
 				}
@@ -139,19 +140,14 @@
 		`)
 	})
 
-	client := gophercloud.ServiceClient{
-		Provider: &gophercloud.ProviderClient{
-			TokenID: "1111",
-		},
-		Endpoint: testhelper.Endpoint(),
-	}
+	client := serviceClient()
 
-	result, err := Info(&client, "12345")
+	result, err := Info(client, "12345")
 	if err != nil {
 		t.Fatalf("Error fetching service information: %v", err)
 	}
 
-	if result.ID != "1234" {
+	if result.ID != "12345" {
 		t.Errorf("Unexpected service ID: %s", result.ID)
 	}
 	if *result.Description != "Service One" {
@@ -164,3 +160,35 @@
 		t.Errorf("Unexpected service type: [%s]", result.Type)
 	}
 }
+
+func TestUpdateSuccessful(t *testing.T) {
+	testhelper.SetupHTTP()
+	defer testhelper.TeardownHTTP()
+
+	testhelper.Mux.HandleFunc("/services/12345", func(w http.ResponseWriter, r *http.Request) {
+		testhelper.TestMethod(t, r, "PATCH")
+		testhelper.TestHeader(t, r, "X-Auth-Token", tokenID)
+		testhelper.TestJSONRequest(t, r, `{ "type": "lasermagic" }`)
+
+		w.Header().Add("Content-Type", "application/json")
+		fmt.Fprintf(w, `
+			{
+				"service": {
+						"id": "12345",
+						"type": "lasermagic"
+				}
+			}
+		`)
+	})
+
+	client := serviceClient()
+
+	result, err := Update(client, "12345", "lasermagic")
+	if err != nil {
+		t.Fatalf("Unable to update service")
+	}
+
+	if result.ID != "12345" {
+
+	}
+}