--- a/mercurial/cmdutil.py	Wed Feb 22 12:09:17 2017 +0100
+++ b/mercurial/cmdutil.py	Thu Feb 23 21:20:26 2017 +0900
@@ -2235,6 +2235,8 @@
         if opts.get('rev'):
             endrev = scmutil.revrange(repo, opts.get('rev')).max() + 1
         getrenamed = templatekw.getrenamedfn(repo, endrev=endrev)
+
+    ui.pager('log')
     displayer = show_changeset(ui, repo, opts, buffered=True)
     displaygraph(ui, repo, revdag, displayer, graphmod.asciiedges, getrenamed,
                  filematcher)