diff --git a/CHANGELOG b/CHANGELOG
index 29567da9ab..d21545a51d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Add default value to Boolean fields at database level
+
 Version 1.6.0 - 2010-05-08
 * Bug fixes (see mercurial logs for details)
 * Add symbol parameter to formatLang
diff --git a/trytond/model/modelsql.py b/trytond/model/modelsql.py
index 23f7afd72c..33df209aac 100644
--- a/trytond/model/modelsql.py
+++ b/trytond/model/modelsql.py
@@ -123,6 +123,9 @@ class ModelSQL(ModelStorage):
                 if isinstance(field, (fields.Integer, fields.Float)):
                     table.db_default(field_name, 0)
 
+                if isinstance(field, (fields.Boolean)):
+                    table.db_default(field_name, False)
+
                 if isinstance(field, fields.Many2One):
                     if field.model_name in ('res.user', 'res.group'):
                         ref = field.model_name.replace('.','_')