diff --git a/gns3server/compute/dynamips/nodes/ethernet_switch.py b/gns3server/compute/dynamips/nodes/ethernet_switch.py
index 5798b1e41..efeb6da77 100644
--- a/gns3server/compute/dynamips/nodes/ethernet_switch.py
+++ b/gns3server/compute/dynamips/nodes/ethernet_switch.py
@@ -246,7 +246,7 @@ class EthernetSwitch(Device):
         elif settings["type"] == "dot1q":
             yield from self.set_dot1q_port(port_number, settings["vlan"])
         elif settings["type"] == "qinq":
-            yield from self.set_qinq_port(port_number, settings["vlan"], settings["ethertype"])
+            yield from self.set_qinq_port(port_number, settings["vlan"], settings.get("ethertype"))
 
     @asyncio.coroutine
     def set_access_port(self, port_number, vlan_id):