diff -r 9358124b4a65 -r c18292a6ff54 mercurial/help.py
--- a/mercurial/help.py	Tue Dec 22 23:25:17 2015 +0000
+++ b/mercurial/help.py	Wed Dec 30 16:21:57 2015 -0700
@@ -187,6 +187,8 @@
      loaddoc('bundles', subdir='internals')),
     (['changegroups'], _('representation of revlog data'),
      loaddoc('changegroups', subdir='internals')),
+    (['revlogs'], _('revision storage mechanism'),
+     loaddoc('revlogs', subdir='internals')),
 ])
 
 def internalshelp(ui):