diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index af84e1c..97846dc 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -61,6 +61,8 @@
 	.exit	= event__process_task,
 	.fork	= event__process_task,
 	.lost	= event__process_lost,
+	.ordered_samples = true,
+	.ordering_requires_timestamps = true,
 };
 
 static void perf_session__insert_hist_entry_by_name(struct rb_root *root,