diff --git a/src/isartc.c b/src/isartc.c
index b5b4363b6..f72743d42 100644
--- a/src/isartc.c
+++ b/src/isartc.c
@@ -28,7 +28,7 @@
  * NOTE:	The IRQ functionalities have been implemented, but not yet
  *		tested, as I need to write test software for them first :)
  *
- * Version:	@(#)isartc.c	1.0.5	2018/09/03
+ * Version:	@(#)isartc.c	1.0.6	2018/10/07
  *
  * Author:	Fred N. van Kempen, <decwiz@yahoo.com>
  *
@@ -68,6 +68,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <stdlib.h>
+#include <time.h>
 #include <wchar.h>
 #include "86box.h"
 #include "cpu/cpu.h"