diff --git a/mach/z8000/cg/mach.c b/mach/z8000/cg/mach.c
index 2c809778b..38b7dd6d5 100644
--- a/mach/z8000/cg/mach.c
+++ b/mach/z8000/cg/mach.c
@@ -9,8 +9,8 @@
  * machine dependent back end routines for the z8000
  */
 
-con_part(sz,w) register sz; word w; {
-
+void con_part(register int sz, word w)
+{
 	while (part_size % sz)
 		part_size++;
 	if (part_size == TEM_WSIZE)
@@ -27,15 +27,15 @@ con_part(sz,w) register sz; word w; {
 	part_size += sz;
 }
 
-con_mult(sz) word sz; {
-
+void con_mult(word sz)
+{
 	if (sz != 4)
 		fatal("bad icon/ucon size");
 	fprintf(codefile,"\t.data4 %s\n", str);
 }
 
-con_float() {
-
+void con_float(void)
+{
 static int been_here;
 	if (argval != 4 && argval != 8)
 		fatal("bad fcon size");
@@ -58,7 +58,8 @@ string holstr(n) word n; {
 }
 */
 
-prolog(nlocals) full nlocals; {
+void prolog(full nlocals)
+{
 
 	fprintf(codefile,"\tpush\t*RR14, R13\n\tld\tR13, R15\n");
 	if (nlocals == 0)
@@ -67,7 +68,8 @@ prolog(nlocals) full nlocals; {
 		fprintf(codefile,"\tsub\tR15, $%d\n",nlocals);
 }
 
-mes(type) word type ; {
+void mes(word type)
+{
 	int argt ;
 
 	switch ( (int)type ) {
diff --git a/mach/z8000/cg/mach.h b/mach/z8000/cg/mach.h
index 76581ecfc..7a54dd0b7 100644
--- a/mach/z8000/cg/mach.h
+++ b/mach/z8000/cg/mach.h
@@ -1,8 +1,10 @@
-/* $Id$ */
 /*
  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
+#include "tables.h"
+#include "types.h"
+
 #define ex_ap(y)        fprintf(codefile,".extern %s\n",y)
 #define in_ap(y)        /* nothing */
 
@@ -28,3 +30,9 @@
 #define fmt_id(sf,st)	sprintf(st,"_%s", sf)
 
 #define BSS_INIT        0
+
+void con_float(void);
+void con_mult(word sz);
+void con_part(register int sz, word w);
+void mes(word type);
+void prolog(full nlocals);