diff -r d74141ccfd8b -r d0869a6e83ab mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Jul 12 23:36:10 2017 +0200
+++ b/mercurial/configitems.py	Wed Jul 12 23:36:28 2017 +0200
@@ -79,6 +79,9 @@
 coreconfigitem('color', 'mode',
     default='auto',
 )
+coreconfigitem('color', 'pagermode',
+    default=dynamicdefault,
+)
 coreconfigitem('devel', 'all-warnings',
     default=False,
 )