diff --git a/README.md b/README.md
index 3aedaa5..95c11ba 100644
--- a/README.md
+++ b/README.md
@@ -411,7 +411,7 @@ It will create a separate instance of `mlat-client` for each defined MLAT server
 ```yaml
     environment:
     ...
-      - ULTRAFEEDERCONFIG=
+      - ULTRAFEEDER_CONFIG=
            ...
            mlat,mlat-server1.com,port1,return_port1,uuid=1234-5678-90123,inputconnect=remote_receiver1:30005,lat=12.3456,lon=45.6789,alt=18m,--arg1 hello --arg2 world;
            mlat,mlat-server2.com,port2,return_port2,uuid=5678-9012-34567,inputconnect=remote_receiver2:30005,-lat=12.3456,lon=45.6789,alt=18m,--arg1 hello-again --arg2 universe