--- a/hgext/rebase.py	Tue Mar 21 23:30:13 2017 +0100
+++ b/hgext/rebase.py	Tue Mar 21 21:26:52 2017 -0700
@@ -686,7 +686,7 @@
         # Validate input and define rebasing points
         destf = opts.get('dest', None)
 
-        if ui.config('commands', 'rebase.requiredest', False):
+        if ui.config('commands', 'rebase.requiredest'):
             if not destf:
                 raise error.Abort(_('you must specify a destination'),
                                   hint=_('use: hg rebase -d REV'))