diff --git a/.env.sample b/.env.sample
index e831f62..5cf064b 100644
--- a/.env.sample
+++ b/.env.sample
@@ -11,6 +11,8 @@ SECRET_REGISTRATION_SHARED_SECRET_VERSION=v1
 SECRET_MACAROON_SECRET_KEY_VERSION=v1
 SECRET_FORM_SECRET_VERSION=v1
 
+COMPOSE_FILE="compose.yml"
+
 #DISABLE_FEDERATION=1
 
 #COMPOSE_FILE="compose.yml:compose.keycloak.yml"