diff --git a/lib/common.lib.php b/lib/common.lib.php
index 8efac16b0..4dd84e663 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -141,7 +141,7 @@ function get_cookie($cookie_name)
 {
     $cookie = md5($cookie_name);
     if (array_key_exists($cookie, $_COOKIE))
-        return base64_decode($_COOKIE[md5($cookie_name)]);
+        return base64_decode($_COOKIE[$cookie]);
     else
         return "";
 }