diff --git a/compose.yml b/compose.yml
index e1132f1..69b14ea 100644
--- a/compose.yml
+++ b/compose.yml
@@ -10,6 +10,7 @@ services:
       - MEDIAWIKI_SITENAME
       - MEDIAWIKI_SITENAMESPACE
       - MEDIAWIKI_LOGO_FILE
+      - MEDIAWIKI_IS_PRIVATE
       - SAML_ENABLED
       - OPENID_ENABLED
       - DB_HOST=db