diff --git a/src/ch17-06-futures-tasks-threads.md b/src/ch17-06-futures-tasks-threads.md
index b78902a38e..a2d801c0f3 100644
--- a/src/ch17-06-futures-tasks-threads.md
+++ b/src/ch17-06-futures-tasks-threads.md
@@ -99,7 +99,7 @@ Next, we’ll talk about idiomatic ways to model problems and structure solution
 as your Rust programs get bigger. In addition, we’ll discuss how Rust’s idioms
 relate to those you might be familiar with from object-oriented programming.
 
-[ch16]: http://localhost:3000/ch16-00-concurrency.html
+[ch16]: ch16-00-concurrency.html
 [combining-futures]: ch17-03-more-futures.html#building-our-own-async-abstractions
 [streams]: ch17-04-streams.html#composing-streams
 [ch21]: ch21-00-final-project-a-web-server.html