diff --git a/src/addons.js b/src/addons.js
index ed7687974..827228c83 100644
--- a/src/addons.js
+++ b/src/addons.js
@@ -1375,6 +1375,7 @@ function startTurn(existingInfra, callback) {
 
     if (existingInfra.version === infra.version && existingInfra.images.turn && infra.images.turn.tag === existingInfra.images.turn.tag) return callback();
 
+    // this exports 3478/tcp, 5349/tls and 50000-51000/udp
     const cmd = `docker run --restart=always -d --name="turn" \
                 --hostname turn \
                 --net host \