diff --git a/commerce/configure.zcml b/commerce/configure.zcml
index a5039dd..14dd1d6 100644
--- a/commerce/configure.zcml
+++ b/commerce/configure.zcml
@@ -4,7 +4,7 @@
    xmlns:zope="http://namespaces.zope.org/zope"
    xmlns:browser="http://namespaces.zope.org/browser"
    xmlns:i18n="http://namespaces.zope.org/i18n"
-   i18n_domain="zope">
+   i18n_domain="cybertools.commerce">
 
   <i18n:registerTranslations directory="locales" />
 
diff --git a/commerce/interfaces.py b/commerce/interfaces.py
index 127f836..69c9557 100644
--- a/commerce/interfaces.py
+++ b/commerce/interfaces.py
@@ -162,7 +162,7 @@ class ICustomer(Interface):
         its own.
     """
 
-    customerId = schema.ASCII(
+    customerId = schema.ASCIILine(
             title=_(u'Customer Identifier'),
             description=_(u'A name or number uniquely identifiying the customer.'),
             default='',