diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 5052caa91caa92b9e33578778a57213d05df6675..d53e706a6f1706d2d69caa93132521f55d89d072 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2405,7 +2405,7 @@ static int timehist_sched_change_event(struct perf_tool *tool,
 	if (ptime->start && ptime->start > t)
 		goto out;
 
-	if (ptime->start > tprev)
+	if (tprev && ptime->start > tprev)
 		tprev = ptime->start;
 
 	/*