diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index d943d6773b3f579880ccd234e47dcdadce0a6c61..04bfba174370b33b24fd1e8c10fbcb2537b91faf 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -700,7 +700,7 @@ static inline void process_adjtimex_modes(const struct timex *txc, s32 *time_tai
 		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)