diff --git a/src/view/form.js b/src/view/form.js
index b94425d0f2..d79647f9a3 100644
--- a/src/view/form.js
+++ b/src/view/form.js
@@ -1141,7 +1141,7 @@ function eval_pyson(value){
         }
         var session = this.model.session;
         var params = [
-            [['translatable', '=', 'true']]
+            [['translatable', '=', true]]
         ];
         var args = {
             'method': 'model.ir.lang.search',