diff --git a/puppet/services/opendaylight-ovs.yaml b/puppet/services/opendaylight-ovs.yaml
index 8ac0cf1884..4402596ad3 100644
--- a/puppet/services/opendaylight-ovs.yaml
+++ b/puppet/services/opendaylight-ovs.yaml
@@ -40,7 +40,7 @@ parameters:
                  vary per host or role to constrain which hosts nova instances
                  and networks are scheduled to.
     type: comma_delimited_list
-    default: ['local', 'vlan', 'vxlan', 'gre']
+    default: ['local', 'flat', 'vlan', 'vxlan', 'gre']
     tags:
       - role_specific
   OvsEnableDpdk:
diff --git a/releasenotes/notes/fix-odl-ovs-allowed-network-types-d196d6d40fadb1bc.yaml b/releasenotes/notes/fix-odl-ovs-allowed-network-types-d196d6d40fadb1bc.yaml
new file mode 100644
index 0000000000..1bec4b2240
--- /dev/null
+++ b/releasenotes/notes/fix-odl-ovs-allowed-network-types-d196d6d40fadb1bc.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes missing type "flat" from the default allowed network types for
+    the ODL OVS parameter HostAllowedNetworkTypes.  See
+    https://bugs.launchpad.net/tripleo/+bug/1762495