diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c
index a1a4a3c470b..e22c987f8a0 100644
--- a/sys/kern/kern_event.c
+++ b/sys/kern/kern_event.c
@@ -658,21 +658,21 @@ timer2sbintime(int64_t data, int flags)
 			return (secs << 32 | US_TO_SBT(data % 1000000));
 		}
 		return (US_TO_SBT(data));
 	case NOTE_NSECONDS:
 		if (data >= 1000000000) {
 			secs = data / 1000000000;
 #ifdef __LP64__
 			if (secs > (SBT_MAX / SBT_1S))
 				return (SBT_MAX);
 #endif
-			return (secs << 32 | US_TO_SBT(data % 1000000000));
+			return (secs << 32 | NS_TO_SBT(data % 1000000000));
 		}
 		return (NS_TO_SBT(data));
 	default:
 		break;
 	}
 	return (-1);
 }
 
 struct kq_timer_cb_data {
 	struct callout c;