diff --git a/usr.sbin/ac/ac.c b/usr.sbin/ac/ac.c
index e4dab9d2c927..322865adb21f 100644
--- a/usr.sbin/ac/ac.c
+++ b/usr.sbin/ac/ac.c
@@ -29,6 +29,7 @@ static const char rcsid[] =
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <timeconv.h>
 #include <unistd.h>
 #include <utmp.h>
 
diff --git a/usr.sbin/lastlogin/lastlogin.c b/usr.sbin/lastlogin/lastlogin.c
index 77c89948e3fc..9f083777b817 100644
--- a/usr.sbin/lastlogin/lastlogin.c
+++ b/usr.sbin/lastlogin/lastlogin.c
@@ -42,6 +42,7 @@ __RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <timeconv.h>
 #include <utmp.h>
 #include <unistd.h>