diff -r 1c48a8278b2f -r f1f57e4e55e0 mercurial/commands.py
--- a/mercurial/commands.py	Sun Mar 12 17:16:43 2017 -0700
+++ b/mercurial/commands.py	Mon Mar 13 11:03:59 2017 -0700
@@ -1223,6 +1223,7 @@
     Returns 0.
     """
 
+    ui.pager('branches')
     fm = ui.formatter('branches', opts)
     hexfunc = fm.hexfunc