diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -397,9 +397,9 @@
                 and dest in changes.salvaged
             ):
                 minor[dest] = value
-            elif not isancestor(new_tt, other_tt):
+            elif changes is not None and dest in changes.merged:
                 minor[dest] = value
-            elif changes is not None and dest in changes.merged:
+            elif not isancestor(new_tt, other_tt):
                 minor[dest] = value