diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index b32b42c424e0..58aba0a3484d 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -692,11 +692,10 @@ static inline void process_adjtimex_modes(const struct timex *txc, s32 *time_tai
 		time_esterror = clamp(txc->esterror, (__kernel_long_t)0, (__kernel_long_t)NTP_PHASE_LIMIT);
 
 	if (txc->modes & ADJ_TIMECONST) {
-		time_constant = txc->constant;
+		time_constant = clamp(txc->constant, (__kernel_long_t)0, (__kernel_long_t)MAXTC);
 		if (!(time_status & STA_NANO))
 			time_constant += 4;
-		time_constant = min(time_constant, (long)MAXTC);
-		time_constant = max(time_constant, 0l);
+		time_constant = clamp(time_constant, (long)0, (long)MAXTC);
 	}
 
 	if (txc->modes & ADJ_TAI &&