diff --git a/libraries/src/Helper/MediaHelper.php b/libraries/src/Helper/MediaHelper.php
index 623b8e5976851..defd4d9cc62af 100644
--- a/libraries/src/Helper/MediaHelper.php
+++ b/libraries/src/Helper/MediaHelper.php
@@ -56,7 +56,7 @@ public static function isImage($fileName)
     {
         static $imageTypes = 'xcf|odg|gif|jpg|jpeg|png|bmp|webp|avif';
 
-        return preg_match("/\.(?:$imageTypes)$/i", $fileName);
+        return (bool) preg_match("/\.(?:$imageTypes)$/i", $fileName);
     }
 
     /**