diff --git a/web_tree_image/__openerp__.py b/web_tree_image/__openerp__.py
index 4d77d720..134f9514 100644
--- a/web_tree_image/__openerp__.py
+++ b/web_tree_image/__openerp__.py
@@ -27,7 +27,7 @@
     "author": "Therp BV",
     "description": """\
 This module defines a tree image widget, to be used with either binary fields
-or function fields of type character. Use widget='tree_image' in your view
+or (function) fields of type character. Use widget='tree_image' in your view
 definition. Optionally, set a 'height' tag. Default height is 16px.
 
 If you use the widget with a character field, the content of the field can be