diff --git a/src/nusoap.php b/src/nusoap.php
index 9dd79ae..e281b76 100755
--- a/src/nusoap.php
+++ b/src/nusoap.php
@@ -4257,7 +4257,7 @@ function serialize_return()
     {
         $this->debug('Entering serialize_return methodname: ' . $this->methodname . ' methodURI: ' . $this->methodURI);
         // if fault
-        if (isset($this->methodreturn) && is_object($this->methodreturn) && ((get_class($this->methodreturn) == 'soap_fault') || (get_class($this->methodreturn) == 'nusoap_fault'))) {
+        if (isset($this->methodreturn) && ((get_class($this->methodreturn) == 'soap_fault') || (get_class($this->methodreturn) == 'nusoap_fault'))) {
             $this->debug('got a fault object from method');
             $this->fault = $this->methodreturn;
             return;