diff --git a/sys/arch/macppc/dev/zs.c b/sys/arch/macppc/dev/zs.c
index e251950fdfba..9e854fbb8aad 100644
--- a/sys/arch/macppc/dev/zs.c
+++ b/sys/arch/macppc/dev/zs.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: zs.c,v 1.25 2003/01/28 12:35:32 pk Exp $	*/
+/*	$NetBSD: zs.c,v 1.26 2003/02/15 02:28:22 tsutsui Exp $	*/
 
 /*
  * Copyright (c) 1996, 1998 Bill Studenmund
@@ -523,7 +523,6 @@ zs_txdma_int(arg)
 	struct zsc_softc *zsc;
 	struct zs_chanstate *cs;
 	int unit = 0;			/* XXX */
-	extern int zstty_txdma_int();
 
 	zsc = zsc_cd.cd_devs[unit];
 	if (zsc == NULL)
diff --git a/sys/arch/macppc/include/z8530var.h b/sys/arch/macppc/include/z8530var.h
index 7351b6e36749..c207e32bc313 100644
--- a/sys/arch/macppc/include/z8530var.h
+++ b/sys/arch/macppc/include/z8530var.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: z8530var.h,v 1.5 2002/03/17 19:40:45 atatat Exp $	*/
+/*	$NetBSD: z8530var.h,v 1.6 2003/02/15 02:28:23 tsutsui Exp $	*/
 
 /*
  * Copyright (c) 1994 Gordon W. Ross
@@ -148,3 +148,8 @@ struct zschan {
 void	zs_putc __P((/* register volatile struct zschan * */void *, int));
 int	zs_getc __P((/* register volatile struct zschan * */void *));
 void zs_kgdb_init __P((void));
+
+#ifdef ZS_TXDMA
+void zstty_txdma_int __P((void *));
+void zs_dma_setup __P((struct zs_chanstate *, caddr_t, int));
+#endif