--- gnushogi-1.3/gnushogi/gnushogi.h.orig	2002-04-26 17:42:22.000000000 +0200
+++ gnushogi-1.3/gnushogi/gnushogi.h	2004-01-02 13:18:37.000000000 +0100
@@ -118,6 +118,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <string.h>
+#include <errno.h>
 
 #include <sys/param.h>
 #include <sys/types.h>