diff --git a/vmware_nsx/db/migration/alembic_migrations/versions/liberty/contract/3c88bdea3054_nsxv_vdr_dhcp_binding.py b/vmware_nsx/db/migration/alembic_migrations/versions/liberty/contract/3c88bdea3054_nsxv_vdr_dhcp_binding.py
index 9e4e02a07b..5930f444ad 100644
--- a/vmware_nsx/db/migration/alembic_migrations/versions/liberty/contract/3c88bdea3054_nsxv_vdr_dhcp_binding.py
+++ b/vmware_nsx/db/migration/alembic_migrations/versions/liberty/contract/3c88bdea3054_nsxv_vdr_dhcp_binding.py
@@ -21,11 +21,17 @@ Create Date: 2015-09-23 14:59:15.102609
 
 """
 
+from alembic import op
+
+from neutron.db import migration
+
+
 # revision identifiers, used by Alembic.
 revision = '3c88bdea3054'
 down_revision = '393bf843b96'
 
-from alembic import op
+# milestone identifier, used by neutron-db-manage
+neutron_milestone = [migration.LIBERTY]
 
 
 def upgrade():
diff --git a/vmware_nsx/db/migration/alembic_migrations/versions/liberty/expand/279b70ac3ae8_nsxv3_add_l2gwconnection_table.py b/vmware_nsx/db/migration/alembic_migrations/versions/liberty/expand/279b70ac3ae8_nsxv3_add_l2gwconnection_table.py
index 32074174a8..26e13ab639 100644
--- a/vmware_nsx/db/migration/alembic_migrations/versions/liberty/expand/279b70ac3ae8_nsxv3_add_l2gwconnection_table.py
+++ b/vmware_nsx/db/migration/alembic_migrations/versions/liberty/expand/279b70ac3ae8_nsxv3_add_l2gwconnection_table.py
@@ -21,12 +21,18 @@ Create Date: 2015-08-14 02:04:09.807926
 
 """
 
+from alembic import op
+import sqlalchemy as sa
+
+from neutron.db import migration
+
+
 # revision identifiers, used by Alembic.
 revision = '279b70ac3ae8'
 down_revision = '28430956782d'
 
-from alembic import op
-import sqlalchemy as sa
+# milestone identifier, used by neutron-db-manage
+neutron_milestone = [migration.LIBERTY]
 
 
 def upgrade():