diff --git a/lib/application.js b/lib/application.js
index 7daf36dd..37eba58b 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -52,7 +52,7 @@ app.models = {};
  */
  
 app.modelBuilder = function () {
-  return this.modelBuilder || (this._modelBuilder = new ModelBuilder())
+  return this._modelBuilder || (this._modelBuilder = new ModelBuilder())
 }
 
 /**