diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 879e4d652a5e..7240d0131eee 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -1702,13 +1702,13 @@ sysctl_usec_to_sbintime(SYSCTL_HANDLER_ARGS)
 	sbintime_t sb;
 
 	tt = *(int64_t *)arg1;
-	sb = ustosbt(tt);
+	sb = sbttous(tt);
 
 	error = sysctl_handle_64(oidp, &sb, 0, req);
 	if (error || !req->newptr)
 		return (error);
 
-	tt = sbttous(sb);
+	tt = ustosbt(sb);
 	*(int64_t *)arg1 = tt;
 
 	return (0);
@@ -1725,13 +1725,13 @@ sysctl_msec_to_sbintime(SYSCTL_HANDLER_ARGS)
 	sbintime_t sb;
 
 	tt = *(int64_t *)arg1;
-	sb = mstosbt(tt);
+	sb = sbttoms(tt);
 
 	error = sysctl_handle_64(oidp, &sb, 0, req);
 	if (error || !req->newptr)
 		return (error);
 
-	tt = sbttoms(sb);
+	tt = mstosbt(sb);
 	*(int64_t *)arg1 = tt;
 
 	return (0);