diff --git a/changelog.d/20240621_105210_mdickinson_add_event_types_to_api.rst b/changelog.d/20240621_105210_mdickinson_add_event_types_to_api.rst
index 6293b9767..34f2f1cf2 100644
--- a/changelog.d/20240621_105210_mdickinson_add_event_types_to_api.rst
+++ b/changelog.d/20240621_105210_mdickinson_add_event_types_to_api.rst
@@ -12,7 +12,7 @@ Added
 
 - Event types for the ``event`` received by observers have been made
   available in ``traits.observation.api``. This is useful for those
-  wanting to use the types in type annotations.
+  wanting to use the types in type annotations. (#1805)
 
 .. Changed
 .. -------