diff --git a/docs/discovery.md b/docs/discovery.md
index ca6de0c96f..3167de54aa 100644
--- a/docs/discovery.md
+++ b/docs/discovery.md
@@ -219,7 +219,10 @@ And for the `nodes` discovery method.
 
 ## Contributing a new discovery backend
 
-You can contribute a new discovery backend to Swarm. For information on how to do this, see <a href="https://github.com/docker/swarm/blob/master/discovery/README.md>our discovery README in the Docker Swarm repository</a>.
+You can contribute a new discovery backend to Swarm. For information on how to
+do this, see <a
+href="https://github.com/docker/swarm/blob/master/discovery/README.md">our
+discovery README in the Docker Swarm repository</a>.
 
 ## Docker Swarm documentation index