diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 69441faab3d0c..3e87c21c293cb 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -148,6 +148,9 @@ static int set_percent_time(struct perf_time_interval *ptime, double start_pcnt,
 	ptime->start = start + round(start_pcnt * total);
 	ptime->end = start + round(end_pcnt * total);
 
+	if (ptime->end > ptime->start && ptime->end != end)
+		ptime->end -= 1;
+
 	return 0;
 }