diff --git a/stand/libsa/ioctl.c b/stand/libsa/ioctl.c
--- a/stand/libsa/ioctl.c
+++ b/stand/libsa/ioctl.c
@@ -66,7 +66,7 @@
 #include "stand.h"
 
 int
-ioctl(int fd, u_long cmd, char *arg)
+ioctl(int fd, u_long cmd, void *arg)
 {
 	struct open_file *f;
 
diff --git a/stand/libsa/stand.h b/stand/libsa/stand.h
--- a/stand/libsa/stand.h
+++ b/stand/libsa/stand.h
@@ -315,6 +315,7 @@
 extern void	closeall(void);
 extern ssize_t	read(int, void *, size_t);
 extern ssize_t	write(int, const void *, size_t);
+extern int	ioctl(int, u_long, void *);
 extern struct	dirent *readdirfd(int);
 extern void	preload(int);
 
diff --git a/sys/sys/ioccom.h b/sys/sys/ioccom.h
--- a/sys/sys/ioccom.h
+++ b/sys/sys/ioccom.h
@@ -82,7 +82,7 @@
 #define	_IOC_INVALID	(_IOC_VOID|_IOC_INOUT)	/* Never valid cmd value,
 						   use as filler */
 
-#else
+#elif !defined(_STANDALONE)
 
 #include <sys/cdefs.h>