diff --git a/lib/Doctrine/Common/Proxy/AbstractProxyFactory.php b/lib/Doctrine/Common/Proxy/AbstractProxyFactory.php
index 7eb216bfc..9b8be87ea 100644
--- a/lib/Doctrine/Common/Proxy/AbstractProxyFactory.php
+++ b/lib/Doctrine/Common/Proxy/AbstractProxyFactory.php
@@ -98,7 +98,7 @@ public function __construct(ProxyGenerator $proxyGenerator, ClassMetadataFactory
     {
         $this->proxyGenerator  = $proxyGenerator;
         $this->metadataFactory = $metadataFactory;
-        $this->autoGenerate    = (int)$autoGenerate;
+        $this->autoGenerate    = (bool)$autoGenerate;
     }
 
     /**