diff --git a/openerp/fields.py b/openerp/fields.py
index ad559090d00..47eb5771d6f 100644
--- a/openerp/fields.py
+++ b/openerp/fields.py
@@ -505,7 +505,7 @@ class Field(object):
 
         # check type consistency
         if self.type != field.type:
-            raise UserError(_("Type of related field %s is inconsistent with %s") % (self, field))
+            raise TypeError("Type of related field %s is inconsistent with %s" % (self, field))
 
         # determine dependencies, compute, inverse, and search
         self.depends = ('.'.join(self.related),)