diff --git a/sk-usbhid.c b/sk-usbhid.c
index 007c59644..460408868 100644
--- a/sk-usbhid.c
+++ b/sk-usbhid.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sk-usbhid.c,v 1.26 2020/09/09 03:08:01 djm Exp $ */
+/* $OpenBSD: sk-usbhid.c,v 1.27 2020/10/03 03:40:38 djm Exp $ */
 /*
  * Copyright (c) 2019 Markus Friedl
  * Copyright (c) 2020 Pedro Martelletto
@@ -26,6 +26,7 @@
 #include <stdio.h>
 #include <stddef.h>
 #include <stdarg.h>
+#include <time.h>
 #ifdef HAVE_SHA2_H
 #include <sha2.h>
 #endif