diff --git a/CHANGES.rst b/CHANGES.rst
index 68e9d8c671..9106134b46 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -30,6 +30,7 @@ Changes in synapse v0.18.6 (2017-01-06)
 Bug fixes:
 
 * Fix bug when checking if a guest user is allowed to join a room (PR #1772)
+  Thanks to Patrik Oldsberg for diagnosing and the fix!
 
 
 Changes in synapse v0.18.6-rc3 (2017-01-05)