diff --git a/src/MultiRequest.php b/src/MultiRequest.php
index 9d02f04..9c19f2f 100755
--- a/src/MultiRequest.php
+++ b/src/MultiRequest.php
@@ -102,7 +102,7 @@ public function execute()
             curl_close($request->curlHandle);
         }
         curl_multi_close(self::$multiHandler);
-        self::$requestPool = null;
+        self::$requestPool = array();
         return $return;
     }