diff --git a/Classes/EventListener/AssetRenderer/IsInline.php b/Classes/EventListener/AssetRenderer/IsInline.php
index 2dbf0b84..1e91ad4f 100644
--- a/Classes/EventListener/AssetRenderer/IsInline.php
+++ b/Classes/EventListener/AssetRenderer/IsInline.php
@@ -42,7 +42,7 @@ public function __invoke(BeforeJavaScriptsRenderingEvent $event): void
             return;
         }
 
-        $t3sbconcatenate = $settings['t3sbconcatenate'];
+	$t3sbconcatenate = !empty($settings['t3sbconcatenate']) ? TRUE : FALSE;
 
         if ($event->isInline() == false) {
             if ($event->isPriority() == false) {