diff --git a/server.js b/server.js
index 6ea5977..66cd24a 100644
--- a/server.js
+++ b/server.js
@@ -486,7 +486,7 @@ function adminUsers(res) {
 
 async function createAdminUser(req, res) {
   const body = await readJson(req);
-  const companyId = ensureCompany();
+  const companyId = getDefaultSite().company_id;
   const username = normalizeAdminUsername(body.username);
   const displayName = normalizeDisplayName(body.displayName) || username;
   const chatNick = normalizeDisplayName(body.chatNick) || displayName;