diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index ca46e9d..afe2a68 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -378,6 +378,7 @@
 -  Fixed a bug (#779) - :doc:`URI Class <libraries/uri>` didn't always trim slashes from the *uri_string* as shown in the documentation.
 -  Fixed a bug (#134) - :doc:`Database Caching <database/caching>` method ``delete_cache()`` didn't work in some cases due to *cachedir* not being initialized properly.
 -  Fixed a bug (#191) - :doc:`Loader Library <libraries/loader>` ignored attempts for (re)loading databases to ``get_instance()->db`` even when the old database connection is dead.
+-  Fixed a bug (#1255) - :doc:`User Agent Library <libraries/user_agent>` method ``is_referral()`` only checked if ``$_SERVER['HTTP_REFERER']`` exists.
 
 Version 2.1.3
 =============