diff --git a/.env.example b/.env.example
index f2d0531763..0de2512617 100644
--- a/.env.example
+++ b/.env.example
@@ -111,6 +111,9 @@ REDIS_PATH=
 # use only when using 'tcp' or 'http' for REDIS_SCHEME. Leave empty otherwise.
 REDIS_HOST=127.0.0.1
 REDIS_PORT=6379
+
+# defaults to 'default'. Use only with Redis 6+ with proper ACL set. Leave empty otherwise.
+REDIS_USERNAME=
 REDIS_PASSWORD=null
 
 # always use quotes and make sure redis db "0" and "1" exists. Otherwise change accordingly.