diff --git a/src/Factory.php b/src/Factory.php
index 5a923a2d..207bc13c 100644
--- a/src/Factory.php
+++ b/src/Factory.php
@@ -9,9 +9,9 @@ public static function create()
         // @codeCoverageIgnoreStart
         if (function_exists('event_base_new')) {
             return new LibEventLoop();
-        } else if (class_exists('libev\EventLoop')) {
+        } else if (class_exists('libev\EventLoop', false)) {
             return new LibEvLoop;
-        } else if (class_exists('EventBase')) {
+        } else if (class_exists('EventBase', false)) {
             return new ExtEventLoop;
         }