--- a/mercurial/requirements.py	Wed Mar 03 12:33:24 2021 +0100
+++ b/mercurial/requirements.py	Wed Mar 03 12:35:29 2021 +0100
@@ -9,6 +9,7 @@
 
 GENERALDELTA_REQUIREMENT = b'generaldelta'
 DOTENCODE_REQUIREMENT = b'dotencode'
+STORE_REQUIREMENT = b'store'
 
 # When narrowing is finalized and no longer subject to format changes,
 # we should move this to just "narrow" or similar.