diff --git a/class.phpmailer.php b/class.phpmailer.php
index fe37a93bf..a62eb0b10 100644
--- a/class.phpmailer.php
+++ b/class.phpmailer.php
@@ -571,7 +571,7 @@ public function __construct($exceptions = false)
     {
         $this->exceptions = ($exceptions == true);
         //Make sure our autoloader is loaded
-        if (!in_array('PHPMailerAutoload', spl_autoload_functions())) {
+        if (!spl_autoload_functions() || !in_array('PHPMailerAutoload', spl_autoload_functions())) {
             require 'PHPMailerAutoload.php';
         }
     }