diff --git a/compute_hyperv/nova/driver.py b/compute_hyperv/nova/driver.py
index 337ce29b..c97cc5ed 100644
--- a/compute_hyperv/nova/driver.py
+++ b/compute_hyperv/nova/driver.py
@@ -197,7 +197,7 @@ class HyperVDriver(driver.ComputeDriver):
                                       instance,
                                       update_device_metadata=True)
 
-    def detach_volume(self, connection_info, instance, mountpoint,
+    def detach_volume(self, context, connection_info, instance, mountpoint,
                       encryption=None):
         context = nova_context.get_admin_context()
         # The nova compute manager only updates the device metadata in
diff --git a/compute_hyperv/tests/unit/test_driver.py b/compute_hyperv/tests/unit/test_driver.py
index f71b9869..962a0785 100644
--- a/compute_hyperv/tests/unit/test_driver.py
+++ b/compute_hyperv/tests/unit/test_driver.py
@@ -227,8 +227,8 @@ class HyperVDriverTestCase(test_base.HyperVBaseTestCase):
     def test_detach_volume(self):
         mock_instance = fake_instance.fake_instance_obj(self.context)
         self.driver.detach_volume(
-            mock.sentinel.connection_info, mock_instance,
-            mock.sentinel.mountpoint, mock.sentinel.encryption)
+            mock.sentinel.context, mock.sentinel.connection_info,
+            mock_instance, mock.sentinel.mountpoint, mock.sentinel.encryption)
 
         self.driver._volumeops.detach_volume.assert_called_once_with(
             mock.sentinel.admin_context,