diff -r 5e3c718692bb -r d688a8d537b9 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Tue Apr 14 03:27:04 2020 +0200
+++ b/mercurial/localrepo.py	Tue Apr 14 03:18:14 2020 +0200
@@ -3664,7 +3664,7 @@
     if ui.configbool(b'format', b'bookmarks-in-store'):
         requirements.add(bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT)
 
-    if ui.configbool(b'experimental', b'exp-persistent-nodemap'):
+    if ui.configbool(b'format', b'use-persistent-nodemap'):
         requirements.add(NODEMAP_REQUIREMENT)
 
     return requirements