diff --git a/quantum/plugins/openvswitch/agent/ovs_quantum_agent.py b/quantum/plugins/openvswitch/agent/ovs_quantum_agent.py
index be46942d82..8fae799fed 100755
--- a/quantum/plugins/openvswitch/agent/ovs_quantum_agent.py
+++ b/quantum/plugins/openvswitch/agent/ovs_quantum_agent.py
@@ -346,7 +346,8 @@ class OVSQuantumTunnelAgent(object):
 
         self.int_br.set_db_attribute("Port", port.port_name, "tag",
                                      str(lvm.vlan))
-        self.int_br.delete_flows(in_port=port.ofport)
+        if int(port.ofport) != -1:
+            self.int_br.delete_flows(in_port=port.ofport)
 
     def port_unbound(self, port, net_uuid):
         '''Unbind port.