diff --git a/neutron/db/migration/alembic_migrations/versions/4eca4a84f08a_remove_ml2_cisco_cred_db.py b/neutron/db/migration/alembic_migrations/versions/4eca4a84f08a_remove_ml2_cisco_cred_db.py
index ed1e8316cf..10bc6fee82 100644
--- a/neutron/db/migration/alembic_migrations/versions/4eca4a84f08a_remove_ml2_cisco_cred_db.py
+++ b/neutron/db/migration/alembic_migrations/versions/4eca4a84f08a_remove_ml2_cisco_cred_db.py
@@ -50,10 +50,10 @@ def downgrade(active_plugins=None, options=None):
 
     op.create_table(
         'cisco_ml2_credentials',
-        sa.Column('credential_id', sa.string(length=255), nullable=True),
-        sa.Column('tenant_id', sa.string(length=255), nullable=False),
-        sa.Column('credential_name', sa.string(length=255), nullable=False),
-        sa.Column('user_name', sa.string(length=255), nullable=True),
-        sa.Column('password', sa.string(length=255), nullable=True),
+        sa.Column('credential_id', sa.String(length=255), nullable=True),
+        sa.Column('tenant_id', sa.String(length=255), nullable=False),
+        sa.Column('credential_name', sa.String(length=255), nullable=False),
+        sa.Column('user_name', sa.String(length=255), nullable=True),
+        sa.Column('password', sa.String(length=255), nullable=True),
         sa.PrimaryKeyConstraint('tenant_id', 'credential_name')
     )