--- date.y.orig	2016-02-06 23:34:07.626970000 +0100
+++ date.y	2016-02-06 23:34:12.389277000 +0100
@@ -16,6 +16,7 @@
 
 #include <ctype.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "cvs.h"