diff --git a/trytond/ir/translation.py b/trytond/ir/translation.py
index f405d902b0..8a2bfeec8c 100644
--- a/trytond/ir/translation.py
+++ b/trytond/ir/translation.py
@@ -1513,7 +1513,7 @@ class TranslationUpdate(Wizard):
                 & (translation.lang == lang)))
 
         action['pyson_domain'] = PYSONEncoder().encode([
-            ('module', '!=', False),
+            ('module', '!=', None),
             ('lang', '=', lang),
         ])
         return action, {}