--- Xwnmo/romkan_m/rk_main.c.orig	Fri Jul 24 18:31:11 2015
+++ Xwnmo/romkan_m/rk_main.c	Fri Jul 24 18:31:32 2015
@@ -64,6 +64,7 @@
 #endif	/*MULTI*/
 #endif
 #include "rext.h"
+#include <stdlib.h>
 
 #ifdef	MULTI
 #define	DISOUT ((cur_rk->flags & RK_NONISE) ? cur_rk->rk_output : cur_rk->disout)
