diff --git a/composer.json b/composer.json
index e39db7052..fc2100761 100644
--- a/composer.json
+++ b/composer.json
@@ -51,7 +51,6 @@
             "src/Xml/bootstrap.php"
         ],
         "classmap": [
-            "src/Apcu/Resources/stubs",
             "src/Intl/Normalizer/Resources/stubs",
             "src/Php70/Resources/stubs",
             "src/Php54/Resources/stubs"
diff --git a/src/Apcu/Resources/stubs/APCUIterator.php b/src/Apcu/Resources/stubs/APCUIterator.php
deleted file mode 100644
index b6f65dcde..000000000
--- a/src/Apcu/Resources/stubs/APCUIterator.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-class APCUIterator extends APCIterator
-{
-    public function __construct($search = null, $format = APC_ITER_ALL, $chunk_size = 100, $list = APC_LIST_ACTIVE)
-    {
-        parent::__construct('user', $search, $format, $chunk_size, $list);
-    }
-}
diff --git a/src/Apcu/bootstrap.php b/src/Apcu/bootstrap.php
index 248cf35c5..9a373b666 100644
--- a/src/Apcu/bootstrap.php
+++ b/src/Apcu/bootstrap.php
@@ -26,3 +26,13 @@ function apcu_inc($key, $step = 1, &$success = false) { return apc_inc($key, $st
     function apcu_sma_info($limited = false) { return apc_sma_info($limited); }
     function apcu_store($key, $var = null, $ttl = 0) { return apc_store($key, $var, $ttl); }
 }
+
+if (!class_exists('APCUIterator', false)) {
+    class APCUIterator extends APCIterator
+    {
+        public function __construct($search = null, $format = APC_ITER_ALL, $chunk_size = 100, $list = APC_LIST_ACTIVE)
+        {
+            parent::__construct('user', $search, $format, $chunk_size, $list);
+        }
+    }
+}
diff --git a/src/Apcu/composer.json b/src/Apcu/composer.json
index db1c6e8cf..38f0ebf67 100644
--- a/src/Apcu/composer.json
+++ b/src/Apcu/composer.json
@@ -19,8 +19,7 @@
         "php": ">=5.3.3"
     },
     "autoload": {
-        "files": [ "bootstrap.php" ],
-        "classmap": [ "Resources/stubs" ]
+        "files": [ "bootstrap.php" ]
     },
     "minimum-stability": "dev",
     "extra": {