diff --git a/lib/net/authorize/util/HttpClient.php b/lib/net/authorize/util/HttpClient.php
index 9884beb4..3cecdfd6 100644
--- a/lib/net/authorize/util/HttpClient.php
+++ b/lib/net/authorize/util/HttpClient.php
@@ -107,7 +107,9 @@ public function _sendRequest($xmlRequest)
             }
 
         }
-        curl_close($curl_request);
+        if (PHP_VERSION_ID <= 80000) {
+            curl_close($curl_request);
+        }
 
         return $xmlResponse;
     }