diff -Naur ispell-3.1.20.orig/correct.c ispell-3.1.20/correct.c
--- ispell-3.1.20.orig/correct.c	Thu Oct 12 19:04:06 1995
+++ ispell-3.1.20/correct.c	Tue Jan  8 19:39:47 2002
@@ -119,6 +119,7 @@
  */
 
 #include <ctype.h>
+#include <unistd.h>
 #include "config.h"
 #include "ispell.h"
 #include "proto.h"
--- ispell-3.1.20.orig/lookup.c	Mon Jan 23 18:28:27 1995
+++ ispell-3.1.20/lookup.c	Tue Jan  8 19:40:48 2002
@@ -55,6 +55,8 @@
  *
  */
 
+#include <sys/types.h>
+#include <unistd.h>
 #include "config.h"
 #include "ispell.h"
 #include "proto.h"
diff -Naur ispell-3.1.20.orig/term.c ispell-3.1.20/term.c
--- ispell-3.1.20.orig/term.c	Wed Nov  2 18:44:28 1994
+++ ispell-3.1.20/term.c	Tue Jan  8 19:38:44 2002
@@ -71,6 +71,8 @@
 #include <sgtty.h>
 #endif
 #include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 #include <unistd.h>
 
 void		erase P ((void));