diff --git a/compose.yml b/compose.yml
index 3652856..829ac16 100644
--- a/compose.yml
+++ b/compose.yml
@@ -71,6 +71,7 @@ services:
       POSTGRES_PASSWORD_FILE: /run/secrets/db_password
       # https://matrix-org.github.io/synapse/latest/postgres.html#set-up-database
       POSTGRES_INITDB_ARGS: "--encoding=UTF-8 --lc-collate=C --lc-ctype=C"
+      STACK_NAME:
     networks:
       - internal
     healthcheck: