diff --git a/lib/adapter.js b/lib/adapter.js
index 5ef54572..aa625399 100644
--- a/lib/adapter.js
+++ b/lib/adapter.js
@@ -1560,6 +1560,7 @@ module.exports = (function() {
       formattedErr.originalError = err;
     }
 
+    if (formattedErr) formattedErr.raw = err;
     return formattedErr || err;
   }