diff --git a/CHANGES b/CHANGES
index 88e3dc01c2..969e8e167a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,9 @@
+5949.	[func]		Add new isc_loopmgr API that runs the application
+			event loops and completely replaces the isc_app
+			API. Refactor the isc_taskmgr, isc_timermgr and
+			isc_netmgr to use the isc_loopmgr event loops.
+			[GL #3508]
+
 5948.	[bug]		Fix nsec3.c:dns_nsec3_activex() function, add a missing
 			dns_db_detachnode() call. [GL #3500]
 
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index ad45e432bc..6d18e240e6 100644
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -25,7 +25,9 @@ Known Issues
 New Features
 ~~~~~~~~~~~~
 
-- None.
+- Worker threads' event loops are now managed by a new "loop maanger" API,
+  significantly changing the architecture of the task, timer and networking
+  systems for improved performance and code flow. :gl:`#3508`
 
 Removed Features
 ~~~~~~~~~~~~~~~~