diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 99e03bec68e4..4bb9b66338be 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -640,7 +640,7 @@ static inline void process_adjtimex_modes(struct timex *txc,
 		time_constant = max(time_constant, 0l);
 	}
 
-	if (txc->modes & ADJ_TAI && txc->constant > 0)
+	if (txc->modes & ADJ_TAI && txc->constant >= 0)
 		*time_tai = txc->constant;
 
 	if (txc->modes & ADJ_OFFSET)