diff -r 5527aa808dea -r 6a7ff5816c5f mercurial/configitems.py
--- a/mercurial/configitems.py	Tue Apr 17 02:41:25 2018 +0200
+++ b/mercurial/configitems.py	Tue Apr 17 03:07:01 2018 +0200
@@ -440,6 +440,18 @@
 coreconfigitem('experimental', 'bundlecomplevel',
     default=None,
 )
+coreconfigitem('experimental', 'bundlecomplevel.bzip2',
+    default=None,
+)
+coreconfigitem('experimental', 'bundlecomplevel.gzip',
+    default=None,
+)
+coreconfigitem('experimental', 'bundlecomplevel.none',
+    default=None,
+)
+coreconfigitem('experimental', 'bundlecomplevel.zstd',
+    default=None,
+)
 coreconfigitem('experimental', 'changegroup3',
     default=False,
 )