diff --git a/frontend/src/api/client.ts b/frontend/src/api/client.ts
index 380e526..94d3a43 100644
--- a/frontend/src/api/client.ts
+++ b/frontend/src/api/client.ts
@@ -9,6 +9,8 @@ const api = axios.create({
 api.interceptors.request.use((config) => {
   const token = useAuthStore.getState().token
   if (token) config.headers.Authorization = `Bearer ${token}`
+  const tenantId = localStorage.getItem('schaeffler_tenant_id')
+  if (tenantId) config.headers['X-Tenant-ID'] = tenantId
   return config
 })