diff --git a/cloudcontrol/node/hypervisor/__init__.py b/cloudcontrol/node/hypervisor/__init__.py
index e0891857ff2e8aaac51ec39596a5bb27281496d2..5aa9a6fc616f1565e5aafdf5195b2f29caf7512c 100644
--- a/cloudcontrol/node/hypervisor/__init__.py
+++ b/cloudcontrol/node/hypervisor/__init__.py
@@ -262,11 +262,11 @@ class Handler(HostHandler):
         if name in self.hypervisor.domains:
             if mac_address is None:
                 rcode, output = execute(self.main, [self.main.config.vlan_script,
-                                                    name, vlan_update_format])
+                                                    name, '--', vlan_update_format])
             else:
                 rcode, output = execute(self.main, [self.main.config.vlan_script,
                                                     '--iface-macaddr', mac_address,
-                                                    name, vlan_update_format])
+                                                    name, '--', vlan_update_format])
             if rcode != 0:
                 raise RuntimeError(output.strip().split('\n')[-1].strip())
         else: