diff --git a/src/reverseproxy.js b/src/reverseproxy.js
index 07eb3290a..32e9a073f 100644
--- a/src/reverseproxy.js
+++ b/src/reverseproxy.js
@@ -514,7 +514,7 @@ async function writeAppNginxConfig(app, fqdn, type, bundle) {
             data.hideHeaders = [ 'Content-Security-Policy' ];
             if (reverseProxyConfig.csp.includes('frame-ancestors ')) data.hideHeaders.push('X-Frame-Options');
         }
-        if (type === apps.SUBDOMAIN_TYPE_PRIMARY) {
+        if (type === apps.SUBDOMAIN_TYPE_PRIMARY || type == apps.SUBDOMAIN_TYPE_ALIAS) {
             data.proxyAuth = {
                 enabled: app.sso && app.manifest.addons && app.manifest.addons.proxyAuth,
                 id: app.id,