diff --git a/aio/content/tutorial/toh-pt4.md b/aio/content/tutorial/toh-pt4.md
index 4bd2b44a01..6d46b94f25 100644
--- a/aio/content/tutorial/toh-pt4.md
+++ b/aio/content/tutorial/toh-pt4.md
@@ -420,7 +420,7 @@ The service does that work and eventually calls the function with the results or
 
 This is a simplified explanation. Read more about ES2015 Promises in the
 [Promises for asynchronous programming](http://exploringjs.com/es6/ch_promises.html) page of
-[Exploring ES6](http://http://exploringjs.com/es6.html).
+[Exploring ES6](http://exploringjs.com/es6.html).
 
 
 </div>