diff --git a/index.php b/index.php
index e5a6275a70b..a05281443e8 100644
--- a/index.php
+++ b/index.php
@@ -130,7 +130,7 @@ $handler = static function () {
 	}
 };
 
-if (function_exists('frankenphp_handle_request')) {
+if (function_exists('frankenphp_handle_request') && isset($_SERVER['FRANKENPHP_WORKER']) && $_SERVER['FRANKENPHP_WORKER'] === '1') {
 	$maxRequests = (int)($_SERVER['MAX_REQUESTS'] ?? 0);
 	for ($nbRequests = 0; !$maxRequests || $nbRequests < $maxRequests; ++$nbRequests) {
 		$keepRunning = \frankenphp_handle_request($handler);