diff --git a/web_dialog_size/static/src/js/web_dialog_size.js b/web_dialog_size/static/src/js/web_dialog_size.js
index f1684791..93056f72 100644
--- a/web_dialog_size/static/src/js/web_dialog_size.js
+++ b/web_dialog_size/static/src/js/web_dialog_size.js
@@ -32,7 +32,8 @@ Dialog.include({
                 handle: '.modal-header',
                 helper: false
             });
-        }
+        };
+        return this;
     },
 
     close: function() {