diff --git a/neutron/agent/common/ovs_lib.py b/neutron/agent/common/ovs_lib.py
index eaaa9b8434c..6abdfd102ef 100644
--- a/neutron/agent/common/ovs_lib.py
+++ b/neutron/agent/common/ovs_lib.py
@@ -200,7 +200,8 @@ OF_PROTOCOL_TO_VERSION = {
     constants.OPENFLOW11: 2,
     constants.OPENFLOW12: 3,
     constants.OPENFLOW13: 4,
-    constants.OPENFLOW14: 5
+    constants.OPENFLOW14: 5,
+    constants.OPENFLOW15: 6,
 }
 
 
diff --git a/neutron/plugins/ml2/drivers/openvswitch/agent/common/constants.py b/neutron/plugins/ml2/drivers/openvswitch/agent/common/constants.py
index 27dd3878d2d..dced2ccefee 100644
--- a/neutron/plugins/ml2/drivers/openvswitch/agent/common/constants.py
+++ b/neutron/plugins/ml2/drivers/openvswitch/agent/common/constants.py
@@ -150,6 +150,7 @@ OPENFLOW11 = "OpenFlow11"
 OPENFLOW12 = "OpenFlow12"
 OPENFLOW13 = "OpenFlow13"
 OPENFLOW14 = "OpenFlow14"
+OPENFLOW15 = "OpenFlow15"
 
 # A placeholder for dead vlans.
 DEAD_VLAN_TAG = p_const.MAX_VLAN_TAG + 1