diff --git a/src/webfan/MimeStubAPC.php b/src/webfan/MimeStubAPC.php
index e7d0564..6f48676 100644
--- a/src/webfan/MimeStubAPC.php
+++ b/src/webfan/MimeStubAPC.php
@@ -927,7 +927,7 @@ function __construct(){
 
 
   public function getAllHeaders(){
-       $headers = '';
+       $headers = [];
        foreach ($_SERVER as $name => $value)
        {
            if (substr($name, 0, 5) == 'HTTP_')