diff --git a/neutron/db/migration/alembic_migrations/versions/128e042a2b68_ext_gw_mode.py b/neutron/db/migration/alembic_migrations/versions/128e042a2b68_ext_gw_mode.py
index 59ef4090c2f..644c5b03196 100644
--- a/neutron/db/migration/alembic_migrations/versions/128e042a2b68_ext_gw_mode.py
+++ b/neutron/db/migration/alembic_migrations/versions/128e042a2b68_ext_gw_mode.py
@@ -57,7 +57,7 @@ def upgrade(active_plugins=None, options=None):
         return
 
     op.add_column('routers', sa.Column('enable_snat', sa.Boolean(),
-                                       nullable=False, default=True))
+                                       nullable=False, server_default="1"))
     # Set enable_snat to True for existing routers
     op.execute("UPDATE routers SET enable_snat=True")
 
diff --git a/neutron/db/migration/alembic_migrations/versions/40b0aff0302e_mlnx_initial.py b/neutron/db/migration/alembic_migrations/versions/40b0aff0302e_mlnx_initial.py
index 7da75d92749..fd815feba51 100644
--- a/neutron/db/migration/alembic_migrations/versions/40b0aff0302e_mlnx_initial.py
+++ b/neutron/db/migration/alembic_migrations/versions/40b0aff0302e_mlnx_initial.py
@@ -122,7 +122,7 @@ def upgrade(active_plugins=None, options=None):
     )
 
     op.add_column('routers', sa.Column('enable_snat', sa.Boolean(),
-                                       nullable=False, default=True))
+                                       nullable=False, server_default="1"))
     op.create_table(
         'securitygroupportbindings',
         sa.Column('port_id', sa.String(length=36), nullable=False),