diff --git a/openerp/addons/base/ir/ir_fields.py b/openerp/addons/base/ir/ir_fields.py
index 401808dfc30..d20841df9a7 100644
--- a/openerp/addons/base/ir/ir_fields.py
+++ b/openerp/addons/base/ir/ir_fields.py
@@ -39,7 +39,7 @@ class ir_fields_converter(orm.Model):
         value acceptable for a write() on the column ``column``.
 
         By default, tries to get a method on itself with a name matching the
-        pattern ``_$fromtype_$column._type`` and returns it.
+        pattern ``_$fromtype_to_$column._type`` and returns it.
 
         Converter callables can either return a value and a list of warnings
         to their caller or raise ``ValueError``, which will be interpreted as a