diff --git a/src/main/php/web/frontend/HtmxFlow.class.php b/src/main/php/web/frontend/HtmxFlow.class.php
index b2338f6..7ee3987 100755
--- a/src/main/php/web/frontend/HtmxFlow.class.php
+++ b/src/main/php/web/frontend/HtmxFlow.class.php
@@ -34,7 +34,7 @@ public function refresh(array $claims) { return $this->delegate->refresh($claims
    * @return var
    */
   public function authenticate($request, $response, $session) {
-    if ('true' === $request->header('Hx-Request')) {
+    if ('true' === $request->header('HX-Request')) {
       $response->answer(401);
       $response->header('HX-Trigger', 'authenticationexpired');
       return null;