diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -441,8 +441,10 @@
         # Calculate self.obsolete_* sets
         self._handleskippingobsolete()
 
-        rebaseset = destmap.keys()
         if not self.keepf:
+            rebaseset = destmap.keys()
+            rebaseset -= set(self.obsolete_with_successor_in_destination)
+            rebaseset -= self.obsolete_with_successor_in_rebase_set
             try:
                 rewriteutil.precheck(self.repo, rebaseset, action=b'rebase')
             except error.Abort as e: