diff --git a/corepos/db/model.py b/corepos/db/model.py
index 02aa313..318ea45 100644
--- a/corepos/db/model.py
+++ b/corepos/db/model.py
@@ -332,11 +332,11 @@ class MemberType(Base):
     """
     __tablename__ = 'memtype'
 
-    memtype = sa.Column(sa.SmallInteger(), primary_key=True, nullable=False, default=0)
+    id = sa.Column('memtype', sa.SmallInteger(), primary_key=True, nullable=False, default=0)
 
-    memDesc = sa.Column(sa.String(length=20), nullable=True)
+    description = sa.Column('memDesc', sa.String(length=20), nullable=True)
 
-    custdataType = sa.Column(sa.String(length=10), nullable=True)
+    customer_type = sa.Column('custdataType', sa.String(length=10), nullable=True)
 
     discount = sa.Column(sa.SmallInteger(), nullable=True)
 
@@ -344,10 +344,12 @@ class MemberType(Base):
 
     ssi = sa.Column(sa.Boolean(), nullable=True)
 
-    salesCode = sa.Column(sa.Integer(), nullable=True)
+    # TODO: this was apparently added "recently" - isn't present in all DBs
+    # (need to figure out how to conditionally include it in model?)
+    # sales_code = sa.Column('salesCode', sa.Integer(), nullable=True)
 
     def __str__(self):
-        return self.memDesc or ""
+        return self.description or ""
 
 
 class Customer(Base):
@@ -404,7 +406,7 @@ class Customer(Base):
 
     member_type = orm.relationship(
         MemberType,
-        primaryjoin=MemberType.memtype == memType,
+        primaryjoin=MemberType.id == memType,
         foreign_keys=[memType],
         doc="""
         Reference to the :class:`MemberType` to which this member belongs.