diff -r de115db3688e -r bf5e13e38390 mercurial/scmwindows.py
--- a/mercurial/scmwindows.py	Tue Apr 25 22:10:26 2017 -0400
+++ b/mercurial/scmwindows.py	Fri Apr 28 20:51:14 2017 +0900
@@ -16,6 +16,9 @@
 except ImportError:
     import winreg
 
+# MS-DOS 'more' is the only pager available by default on Windows.
+fallbackpager = 'more'
+
 def systemrcpath():
     '''return default os-specific hgrc search path'''
     rcpath = []