diff -r 12aaade1f617 -r b1cf9bb8a5a2 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Jun 28 13:37:59 2017 +0200
+++ b/mercurial/configitems.py	Wed Jun 28 13:31:05 2017 +0200
@@ -65,6 +65,9 @@
 coreconfigitem('devel', 'check-locks',
     default=False,
 )
+coreconfigitem('devel', 'check-relroot',
+    default=False,
+)
 coreconfigitem('patch', 'fuzz',
     default=2,
 )