diff --git a/openstack/identity/v3/endpoints/results.go b/openstack/identity/v3/endpoints/results.go
index d3068df..e972404 100644
--- a/openstack/identity/v3/endpoints/results.go
+++ b/openstack/identity/v3/endpoints/results.go
@@ -30,6 +30,14 @@
 	return gophercloud.NewLinkPager(list)
 }
 
+// Concat adds the contents of another Collection to this one.
+func (list EndpointList) Concat(other gophercloud.Collection) gophercloud.Collection {
+	return EndpointList{
+		client:    list.client,
+		Endpoints: append(list.Endpoints, AsEndpoints(other)...),
+	}
+}
+
 // Service returns the ServiceClient used to acquire this list.
 func (list EndpointList) Service() *gophercloud.ServiceClient {
 	return list.client
diff --git a/openstack/identity/v3/services/results.go b/openstack/identity/v3/services/results.go
index c6ce1b9..88510b4 100644
--- a/openstack/identity/v3/services/results.go
+++ b/openstack/identity/v3/services/results.go
@@ -19,8 +19,8 @@
 type ServiceList struct {
 	gophercloud.PaginationLinks `json:"links"`
 
-	client *gophercloud.ServiceClient
-	Page   []Service `json:"services"`
+	client   *gophercloud.ServiceClient
+	Services []Service `json:"services"`
 }
 
 // Pager indicates that the ServiceList is paginated by next and previous links.
@@ -28,6 +28,14 @@
 	return gophercloud.NewLinkPager(list)
 }
 
+// Concat returns a new collection that's the result of appending a new collection at the end of this one.
+func (list ServiceList) Concat(other gophercloud.Collection) gophercloud.Collection {
+	return ServiceList{
+		client:   list.client,
+		Services: append(list.Services, AsServices(other)...),
+	}
+}
+
 // Service returns the ServiceClient used to acquire this list.
 func (list ServiceList) Service() *gophercloud.ServiceClient {
 	return list.client
@@ -56,5 +64,5 @@
 // AsServices extracts a slice of Services from a Collection acquired from List.
 // It panics if the Collection does not actually contain Services.
 func AsServices(results gophercloud.Collection) []Service {
-	return results.(*ServiceList).Page
+	return results.(*ServiceList).Services
 }