diff --git a/openerp/models.py b/openerp/models.py
index 0b966bd2e36..f96bfae4954 100644
--- a/openerp/models.py
+++ b/openerp/models.py
@@ -2246,7 +2246,7 @@ class BaseModel(object):
                 # if val is a many2one, just write the ID
                 if type(val) == tuple:
                     val = val[0]
-                if val is not False:
+                if f._type == 'boolean' or val is not False:
                     cr.execute(update_query, (ss[1](val), key))
 
     @api.model