--- a/hgext/rebase.py	Wed Mar 09 23:57:15 2016 +0900
+++ b/hgext/rebase.py	Wed Mar 09 08:08:27 2016 -0800
@@ -297,7 +297,8 @@
                     hint=_('use --keep to keep original changesets'))
 
             obsoletenotrebased = {}
-            if ui.configbool('experimental', 'rebaseskipobsolete'):
+            if ui.configbool('experimental', 'rebaseskipobsolete',
+                             default=True):
                 rebasesetrevs = set(rebaseset)
                 rebaseobsrevs = _filterobsoleterevs(repo, rebasesetrevs)
                 obsoletenotrebased = _computeobsoletenotrebased(repo,