diff --git a/src/pocketmine/PocketMine.php b/src/pocketmine/PocketMine.php
index 1a5c1a1c4..cc6d73343 100644
--- a/src/pocketmine/PocketMine.php
+++ b/src/pocketmine/PocketMine.php
@@ -177,15 +177,14 @@ namespace pocketmine {
 		}else{
 			$bootstrap = dirname(__FILE__, 3) . '/vendor/autoload.php';
 		}
-		define('pocketmine\COMPOSER_AUTOLOADER_PATH', $bootstrap);
 
-		if(\pocketmine\COMPOSER_AUTOLOADER_PATH !== false and is_file(\pocketmine\COMPOSER_AUTOLOADER_PATH)){
-			require_once(\pocketmine\COMPOSER_AUTOLOADER_PATH);
-		}else{
+		if($bootstrap === false or !is_file($bootstrap)){
 			critical_error("Composer autoloader not found at " . $bootstrap);
 			critical_error("Please install/update Composer dependencies or use provided builds.");
 			exit(1);
 		}
+		define('pocketmine\COMPOSER_AUTOLOADER_PATH', $bootstrap);
+		require_once(\pocketmine\COMPOSER_AUTOLOADER_PATH);
 
 		set_error_handler([Utils::class, 'errorExceptionHandler']);