diff --git a/engine/swarm/how-swarm-mode-works/nodes.md b/engine/swarm/how-swarm-mode-works/nodes.md
index 8371590e0c..e3171cd9af 100644
--- a/engine/swarm/how-swarm-mode-works/nodes.md
+++ b/engine/swarm/how-swarm-mode-works/nodes.md
@@ -82,4 +82,4 @@ You can also demote a manager node to a worker node. See
 ## Learn More
 
 * Read about how swarm mode [services](services.md) work.
-* Learn how [PKI](pki.md) works in swarm mode
+* Learn how [PKI](pki.md) works in swarm mode.