diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 818a8d40e5c9..bedfd2412ec1 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -569,8 +569,7 @@ static inline unsigned long hpet_time_div(struct hpets *hpets,
 	unsigned long long m;
 
 	m = hpets->hp_tick_freq + (dis >> 1);
-	do_div(m, dis);
-	return (unsigned long)m;
+	return div64_ul(m, dis);
 }
 
 static int