diff --git a/parallelcurl.php b/parallelcurl.php
index 28fb508..56d72e3 100755
--- a/parallelcurl.php
+++ b/parallelcurl.php
@@ -148,10 +148,10 @@ private function checkForCompletedRequests() {
             $callback = $request['callback'];
             $user_data = $request['user_data'];
             
-            call_user_func($callback, $content, $url, $ch, $user_data);
-            
             unset($this->outstanding_requests[$ch_array_key]);
             
+            call_user_func($callback, $content, $url, $ch, $user_data);
+            
             curl_multi_remove_handle($this->multi_handle, $ch);
         }