diff --git a/src/CoreConstants.php b/src/CoreConstants.php
index bf88306f1..63913e941 100644
--- a/src/CoreConstants.php
+++ b/src/CoreConstants.php
@@ -35,3 +35,4 @@ define('pocketmine\_CORE_CONSTANTS_INCLUDED', true);
 
 define('pocketmine\PATH', dirname(__DIR__) . '/');
 define('pocketmine\RESOURCE_PATH', dirname(__DIR__) . '/resources/');
+define('pocketmine\COMPOSER_AUTOLOADER_PATH', dirname(__DIR__) . '/vendor/autoload.php');
diff --git a/src/PocketMine.php b/src/PocketMine.php
index afac6fd8d..88029b5df 100644
--- a/src/PocketMine.php
+++ b/src/PocketMine.php
@@ -214,20 +214,13 @@ JIT_WARNING
 		error_reporting(-1);
 		set_ini_entries();
 
-		$opts = getopt("", ["bootstrap:"]);
-		if(isset($opts["bootstrap"])){
-			$bootstrap = ($real = realpath($opts["bootstrap"])) !== false ? $real : $opts["bootstrap"];
-		}else{
-			$bootstrap = dirname(__FILE__, 2) . '/vendor/autoload.php';
-		}
-
-		if($bootstrap === false or !is_file($bootstrap)){
+		$bootstrap = dirname(__FILE__, 2) . '/vendor/autoload.php';
+		if(!is_file($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', $bootstrap);
-		require_once(\pocketmine\COMPOSER_AUTOLOADER_PATH);
+		require_once($bootstrap);
 
 		$composerGitHash = InstalledVersions::getReference('pocketmine/pocketmine-mp');
 		if($composerGitHash !== null){