diff --git a/merge-ort.c b/merge-ort.c
index 5840832cf3..eea14024c6 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -2208,7 +2208,7 @@ static void detect_regular_renames(struct merge_options *opt,
 	diff_queued_diff = renames->pairs[side_index];
 	trace2_region_enter("diff", "diffcore_rename", opt->repo);
 	diffcore_rename_extended(&diff_opts,
-				 NULL,
+				 &renames->relevant_sources[side_index],
 				 &renames->dirs_removed[side_index],
 				 &renames->dir_rename_count[side_index]);
 	trace2_region_leave("diff", "diffcore_rename", opt->repo);