diff --git a/docs/configuration.asciidoc b/docs/configuration.asciidoc
index 630c51142..669126a17 100644
--- a/docs/configuration.asciidoc
+++ b/docs/configuration.asciidoc
@@ -251,7 +251,7 @@ use the usual client code. In such cases, call `super.method`:
 class MyTransport extends Transport {
   request (params, options, callback) {
     // your code
-    super.request(params, options, callback)
+    return super.request(params, options, callback)
   }
 }
 ----