diff --git a/examples/curl.php b/examples/curl.php
index 18f0cc8..58bddad 100644
--- a/examples/curl.php
+++ b/examples/curl.php
@@ -66,7 +66,7 @@ public function __construct()
 
     public function addHandle($curlHandle)
     {
-        curl_multi_add_handle($mh, $curlHandle);
+        curl_multi_add_handle($this->curlMultiHandle, $curlHandle);
     }
 }
 
diff --git a/lib/coroutine.php b/lib/coroutine.php
index f664efa..1a2cd90 100644
--- a/lib/coroutine.php
+++ b/lib/coroutine.php
@@ -4,8 +4,6 @@
 
 namespace Sabre\Event;
 
-use Generator;
-
 /**
  * Turn asynchronous promise-based code into something that looks synchronous
  * again, through the use of generators.