diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -552,7 +552,6 @@
 
     def _rebasenode(self, tr, rev, allowdivergence, progressfn):
         repo, ui, opts = self.repo, self.ui, self.opts
-        dest = self.destmap[rev]
         ctx = repo[rev]
         desc = _ctxdesc(ctx)
         if self.state[rev] == rev:
@@ -605,16 +604,7 @@
             else:
                 overrides = {(b'ui', b'forcemerge'): opts.get(b'tool', b'')}
                 with ui.configoverride(overrides, b'rebase'):
-                    stats = rebasenode(
-                        repo,
-                        rev,
-                        p1,
-                        p2,
-                        base,
-                        self.collapsef,
-                        dest,
-                        wctx=self.wctx,
-                    )
+                    stats = rebasenode(repo, rev, p1, p2, base, wctx=self.wctx)
                     if stats.unresolvedcount > 0:
                         if self.inmemory:
                             raise error.InMemoryMergeConflictsError()
@@ -1452,7 +1442,7 @@
         return newnode
 
 
-def rebasenode(repo, rev, p1, p2, base, collapse, dest, wctx):
+def rebasenode(repo, rev, p1, p2, base, wctx):
     """Rebase a single revision rev on top of p1 using base as merge ancestor"""
     # Merge phase
     # Update to destination and merge it with local