diff --git a/drivers/timers/pl031.c b/drivers/timers/pl031.c
index a37fd5536c5..58c58d8bb5e 100644
--- a/drivers/timers/pl031.c
+++ b/drivers/timers/pl031.c
@@ -137,7 +137,7 @@ static int pl031_settime(FAR struct rtc_lowerhalf_s *lower,
 
   DEBUGASSERT(priv != NULL && rtctime != NULL);
 
-  time = mktime((FAR struct tm *)rtctime);
+  time = timegm((FAR struct tm *)rtctime);
   pl031_putreg(time, priv->base, PL031_RTCLR);
 
   return 0;
@@ -191,7 +191,7 @@ static int pl031_setalarm(FAR struct rtc_lowerhalf_s *lower,
   priv->alarm.cb = alarminfo->cb;
   priv->alarm.priv = alarminfo->priv;
 
-  time = mktime((FAR struct tm *)&alarminfo->time);
+  time = timegm((FAR struct tm *)&alarminfo->time);
 
   pl031_putreg(time, priv->base, PL031_RTCMR);
   pl031_putreg(1, priv->base, PL031_RTCIMSC);