diff --git a/lib/tasks/config.js b/lib/tasks/config.js
index 50fab5aa..2c84665b 100644
--- a/lib/tasks/config.js
+++ b/lib/tasks/config.js
@@ -54,7 +54,7 @@ class TaskConfig extends Task {
     return  `${this.name}{${phrase.join(',')}`;
   }
 
-  async exec(cs, {ep}) {
+  async exec(cs, {ep} = {}) {
     await super.exec(cs);
 
     if (this.data.amd) {