diff --git a/docs/changelog.txt b/docs/changelog.txt
index ac57e53aa..1690f8a25 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -69,6 +69,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - The ``test/main`` command to invoke the test harness has been renamed to just ``test``
 - DFHack unit tests must now match any output expected to be printed via ``dfhack.printerr()``
 - Fortress mode is now supported for unit tests (allowing tests that require a fortress map to be loaded) - note that these tests are skipped by continuous integration for now, pending a suitable test fortress
+- Unit tests can now use ``delay_until(predicate_fn, timeout_frames)`` to delay until a condition is met
 
 # 0.47.05-r1