diff --git a/openstack/blockstorage/v2/volumes/results.go b/openstack/blockstorage/v2/volumes/results.go
index f00cfe8..1208e10 100644
--- a/openstack/blockstorage/v2/volumes/results.go
+++ b/openstack/blockstorage/v2/volumes/results.go
@@ -1,10 +1,6 @@
 package volumes
 
 import (
-	"encoding/json"
-	"fmt"
-	"reflect"
-
 	"github.com/gophercloud/gophercloud"
 	"github.com/gophercloud/gophercloud/pagination"
 )
@@ -105,28 +101,11 @@
 }
 
 func (r commonResult) ExtractInto(v interface{}) error {
-	t := reflect.TypeOf(v)
-	if k := t.Kind(); k != reflect.Ptr {
-		return fmt.Errorf("Expected pointer to struct, got %v", k)
-	}
-	t = t.Elem()
-	if k := t.Kind(); k != reflect.Struct {
-		return fmt.Errorf("Expected pointer to struct, got %v", k)
-	}
+	return r.Result.ExtractIntoStructPtr(v, "volume")
+}
 
-	var vol map[string]map[string]interface{}
-	err := r.Result.ExtractInto(&vol)
-	if err != nil {
-		return err
-	}
-
-	b, err := json.Marshal(vol["volume"])
-	if err != nil {
-		return err
-	}
-
-	err = json.Unmarshal(b, &v)
-	return err
+func ExtractVolumesInto(r pagination.Page, v interface{}) error {
+	return r.(VolumePage).Result.ExtractIntoSlicePtr(v, "volumes")
 }
 
 // CreateResult contains the response body and error from a Create request.
diff --git a/openstack/blockstorage/v2/volumes/testing/requests_test.go b/openstack/blockstorage/v2/volumes/testing/requests_test.go
index b723e58..0385e50 100644
--- a/openstack/blockstorage/v2/volumes/testing/requests_test.go
+++ b/openstack/blockstorage/v2/volumes/testing/requests_test.go
@@ -12,7 +12,7 @@
 	"github.com/gophercloud/gophercloud/testhelper/client"
 )
 
-func TestList(t *testing.T) {
+func TestListWithExtensions(t *testing.T) {
 	th.SetupHTTP()
 	defer th.TeardownHTTP()
 
@@ -95,6 +95,30 @@
 	}
 }
 
+func TestListAllWithExtensions(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	MockListResponse(t)
+
+	type VolumeWithExt struct {
+		volumes.Volume
+		tenantattr.VolumeExt
+	}
+
+	allPages, err := volumes.List(client.ServiceClient(), &volumes.ListOpts{}).AllPages()
+	th.AssertNoErr(t, err)
+
+	var actual []struct {
+		volumes.Volume
+		tenantattr.VolumeExt
+	}
+	err = volumes.ExtractVolumesInto(allPages, &actual)
+	th.AssertNoErr(t, err)
+	th.AssertEquals(t, 2, len(actual))
+	th.AssertEquals(t, "304dc00909ac4d0da6c62d816bcb3459", actual[0].TenantID)
+}
+
 func TestListAll(t *testing.T) {
 	th.SetupHTTP()
 	defer th.TeardownHTTP()