diff --git a/tests/test_biosdevname.py b/tests/test_biosdevname.py
index fe1808bd..77d149a5 100644
--- a/tests/test_biosdevname.py
+++ b/tests/test_biosdevname.py
@@ -45,8 +45,8 @@ def test(self):
         # check after the fact that we mocked the proper calls
         self.assertEqual(popen_mock.call_count, 2)
         calls = popen_mock.call_args_list
-        self.assertEqual(calls[0].args[0], ['/sbin/biosdevname', '--policy', 'physical', '-d'])
-        self.assertEqual(calls[1].args[0], ['/sbin/biosdevname', '--policy', 'all_ethN', '-d'])
+        self.assertEqual(calls[0].args[0], ['/sbin/biosdevname', '--policy', 'physical', '-d', '-x'])
+        self.assertEqual(calls[1].args[0], ['/sbin/biosdevname', '--policy', 'all_ethN', '-d', '-x'])
         popen_kwargs = {"stdout": PIPE, "stderr": PIPE, "universal_newlines": True}
         self.assertEqual(calls[0].kwargs, popen_kwargs)
         self.assertEqual(calls[1].kwargs, popen_kwargs)
diff --git a/xcp/net/biosdevname.py b/xcp/net/biosdevname.py
index be12d814..9c1427c4 100644
--- a/xcp/net/biosdevname.py
+++ b/xcp/net/biosdevname.py
@@ -40,7 +40,7 @@ def __run_all_devices(policy = "physical"):
     """
 
     proc = Popen(["/sbin/biosdevname", "--policy", policy,
-                  "-d"], stdout=PIPE, stderr=PIPE, universal_newlines=True)
+                  "-d", "-x"], stdout=PIPE, stderr=PIPE, universal_newlines=True)
 
     stdout, stderr = proc.communicate()