diff --git a/lib/chai/config.js b/lib/chai/config.js
index e6f38fff2..a25fed39e 100644
--- a/lib/chai/config.js
+++ b/lib/chai/config.js
@@ -13,7 +13,7 @@ module.exports = {
    * @api public
    */
 
-   includeStack: false,
+  includeStack: false,
 
   /**
    * ### config.showDiff