--- a/xrogue/passages.c	Fri Feb 19 21:02:28 2016 -0500
+++ b/xrogue/passages.c	Wed Mar 02 21:13:26 2016 -0500
@@ -16,15 +16,20 @@
     See the file LICENSE.TXT for full copyright and licensing information.
 */
 
+#include <stdlib.h>
 #include <curses.h>
 #include "rogue.h"
 
+void conn(int r1, int r2);
+void door(struct room *rm, coord *cp);
+
 /*
  * do_passages:
  *      Draw all the passages on a level.
  */
 
-do_passages()
+void
+do_passages(void)
 {
     register struct rdes *r1, *r2 = NULL;
     register int i, j;
@@ -133,8 +138,8 @@
  *      Draw a corridor from a room in a certain direction.
  */
 
-conn(r1, r2)
-int r1, r2;
+void
+conn(int r1, int r2)
 {
     register struct room *rpf, *rpt = NULL;
     register char rmt;
@@ -347,9 +352,8 @@
  * also enters the door in the exits array of the room.
  */
 
-door(rm, cp)
-register struct room *rm;
-register coord *cp;
+void
+door(struct room *rm, coord *cp)
 {
     struct linked_list *newroom;
     coord *exit;