diff --git a/docs/configuration.asciidoc b/docs/configuration.asciidoc
index befd4f03e..65ee06413 100644
--- a/docs/configuration.asciidoc
+++ b/docs/configuration.asciidoc
@@ -233,7 +233,7 @@ Sometimes you just need to inject a little snippet of your code and then continu
 class MyTransport extends Transport {
   request (params, options, callback) {
     // your code
-    super.request(params, options, callback)
+    return super.request(params, options, callback)
   }
 }
 ----