diff --git a/Worker.php b/Worker.php
index 05b88bf..835c781 100644
--- a/Worker.php
+++ b/Worker.php
@@ -303,6 +303,7 @@ function execute($curls, $rolling_window) {
     }
 
     // Execute the rolling curl
+    $running = 0;
     do {
         $execrun = curl_multi_exec($master, $running);
         while ($execrun == CURLM_CALL_MULTI_PERFORM);
diff --git a/src/Emitters/CurlEmitter.php b/src/Emitters/CurlEmitter.php
index 32d6b52..21da6c4 100644
--- a/src/Emitters/CurlEmitter.php
+++ b/src/Emitters/CurlEmitter.php
@@ -173,6 +173,7 @@ private function rollingCurl($curls, $debug) {
         }
 
         // Execute the rolling curl
+        $running = 0;
         do {
             do {
                 $execrun = curl_multi_exec($master, $running);