diff --git a/high-availability/index.md b/high-availability/index.md
index 869200c395..8e9d719486 100644
--- a/high-availability/index.md
+++ b/high-availability/index.md
@@ -80,6 +80,7 @@ or cloud-based load balancer to balance requests across multiple DTR replicas.
 
 Make sure you configure your load balancer to:
 
+* Load-balance TCP traffic on ports 80 and 443,
 * Not terminate HTTPS connections,
 * Use the `/load_balancer_status` endpoint on each DTR replica, to check if
 the replica is healthy and if it should remain on the load balancing pool or