diff --git a/foundations/deploy-ultrafeeder-container.md b/foundations/deploy-ultrafeeder-container.md
index 1f441ec..7cd68e5 100644
--- a/foundations/deploy-ultrafeeder-container.md
+++ b/foundations/deploy-ultrafeeder-container.md
@@ -76,6 +76,7 @@ services:
           mlat,feed.theairtraffic.com,31090,39004
       # --------------------------------------------------
       - UUID=${ULTRAFEEDER_UUID}
+      - MLAT_USER=${FEEDER_NAME}
       - READSB_FORWARD_MLAT_SBS=true
       #
       # --------------------------------------------------