diff -r 6482497d859b -r f69d8c25eeb7 README
--- a/README	Thu Feb 04 11:18:50 2016 +0000
+++ b/README	Thu Feb 11 00:02:39 2016 +0000
@@ -62,7 +62,7 @@
 - tests: drop our copy of 'run-tests.py' use core one instead,
 - bookmark: do all bookmark movement within a transaction.
 - evolve: compatibility with Mercurial 3.7
-- evolve: support merge with a single obsolete parent.
+- evolve: support merge with a single obsolete parent (hg-3.7+ only)
 - evolve: prevent added file to be marked as unknown if evolve fails (issue4966)
 - evolve: stop relying on graftstate file for save evolve state
           (for `hg evolve --continue`)