--- texi2roff-2.0/table.c
+++ texi2roff-2.0/table.c	2005-03-18 17:59:54.000000000 +0000
@@ -32,13 +32,14 @@
 struct misccmds * cmds;
 struct tablerecd * table, * endoftable;
 
+static void patchtable();
+
 void
 initialize(macropkg, showInfo, makeindex)
 int macropkg;
 int showInfo;
 int makeindex;
 {
-    extern void patchtable();
     int tablesize;
 
     switch (macropkg) {
--- texi2roff-2.0/texi2roff.c
+++ texi2roff-2.0/texi2roff.c	2012-07-17 16:09:22.852010105 +0000
@@ -13,6 +13,7 @@
 #include <sys/types.h>
 #endif
 #include <sys/stat.h>
+#include <unistd.h>
 #include "texi2roff.h"
 
 #if !defined(S_ISDIR) && defined(S_IFDIR)