diff --git a/include/class.captcha.php b/include/class.captcha.php
index ca103d920c744e2ea7efd53b75c531c35ba97d90..86f89d9792da363351dee17d151238f03872616e 100644
--- a/include/class.captcha.php
+++ b/include/class.captcha.php
@@ -3,7 +3,7 @@
     class.captcha.php
 
     Very basic captcha class.
-    
+
     Peter Rotich <peter@osticket.com>
     Copyright (c)  2006-2013 osTicket
     http://www.osticket.com
@@ -44,7 +44,7 @@ class Captcha {
         $img= imagecreatefrompng($this->bgimg);
         imagestring($img,$this->font, $x, $y,$this->hash,imagecolorallocate($img,0, 0, 0));
 
-        Header ("(captcha-content-type:) image/png");
+        header("Content-Type: image/png");
         imagepng($img);
         imagedestroy($img);
         $_SESSION['captcha'] = md5($this->hash);