diff --git a/lib/Config/Initializer.php b/lib/Config/Initializer.php
index 573a84eb3d..38f063396f 100644
--- a/lib/Config/Initializer.php
+++ b/lib/Config/Initializer.php
@@ -10,15 +10,6 @@ use MailPoet\WP\Notice as WPNotice;
 if(!defined('ABSPATH')) exit;
 
 require_once(ABSPATH . 'wp-admin/includes/plugin.php');
-require_once(MAILPOET_PATH . '/vendor/autoload.php');
-
-$initializer = new Initializer(
-  array(
-    'file' => MAILPOET_FILENAME,
-    'version' => MAILPOET_VERSION
-  )
-);
-$initializer->init();
 
 class Initializer {
 
diff --git a/mailpoet.php b/mailpoet.php
index a818356a2c..585ffbafea 100644
--- a/mailpoet.php
+++ b/mailpoet.php
@@ -24,8 +24,8 @@ $mailpoet_plugin = array(
   'version' => '3.0.0-beta.14',
   'filename' => __FILE__,
   'path' => dirname(__FILE__),
-  'loader' => dirname(__FILE__) . '/vendor/autoload.php',
-  'initializer' => dirname(__FILE__) . '/lib/Config/Initializer.php'
+  'autoloader' => dirname(__FILE__) . '/vendor/autoload.php',
+  'initializer' => dirname(__FILE__) . '/mailpoet_initializer.php'
 );
 
 // Check for the minimum PHP version
@@ -50,7 +50,7 @@ if(version_compare(phpversion(), '5.3.0', '<')) {
 }
 
 // Check for core dependencies
-if(!file_exists($mailpoet_plugin['loader']) && !file_exists($mailpoet_plugin['initializer'])) {
+if(!file_exists($mailpoet_plugin['autoloader']) && !file_exists($mailpoet_plugin['initializer'])) {
   add_action('admin_notices', function() {
     $notice = __('MailPoet cannot start because it is missing core files. Please reinstall the plugin.', 'mailpoet');
     printf('<div class="error"><p>%1$s</p></div>', $notice);
@@ -59,7 +59,4 @@ if(!file_exists($mailpoet_plugin['loader']) && !file_exists($mailpoet_plugin['in
 }
 
 // Initialize the plugin
-define('MAILPOET_VERSION', $mailpoet_plugin['version']);
-define('MAILPOET_FILENAME', $mailpoet_plugin['filename']);
-define('MAILPOET_PATH', $mailpoet_plugin['path']);
 require_once($mailpoet_plugin['initializer']);
diff --git a/mailpoet_initializer.php b/mailpoet_initializer.php
new file mode 100644
index 0000000000..ad3ff126ce
--- /dev/null
+++ b/mailpoet_initializer.php
@@ -0,0 +1,17 @@
+<?php
+
+use MailPoet\Config\Initializer;
+
+if(!defined('ABSPATH') || empty($mailpoet_plugin)) exit;
+
+require_once($mailpoet_plugin['autoloader']);
+
+define('MAILPOET_VERSION', $mailpoet_plugin['version']);
+
+$initializer = new Initializer(
+  array(
+    'file' => $mailpoet_plugin['filename'],
+    'version' => $mailpoet_plugin['version']
+  )
+);
+$initializer->init();