Index: subversion/libsvn_client/merge.c
===================================================================
--- subversion/libsvn_client/merge.c	(revision 1437292)
+++ subversion/libsvn_client/merge.c	(working copy)
@@ -11570,7 +11570,7 @@
                                                    &source, merge->yca,
                                                    TRUE /* same_repos */,
                                                    depth,
-                                                   FALSE /*diff_ignore_ancestry*/,
+                                                   TRUE /*diff_ignore_ancestry*/,
                                                    force_delete, record_only,
                                                    dry_run,
                                                    merge_options, &use_sleep,