--- xmalloc.c.orig	Sun Jan  8 00:04:35 2012
+++ xmalloc.c	Sun Jan  8 00:04:44 2012
@@ -24,7 +24,7 @@
  */
 #include <stdio.h>
 #include <string.h>
-extern char *malloc(), *realloc();
+#include <stdlib.h>
 
 char *xmalloc (int size)
 {