diff -Naur checkpw-1.02.orig/checkapoppw.c checkpw-1.02/checkapoppw.c
--- checkpw-1.02.orig/checkapoppw.c	2002-01-07 16:25:10.000000000 +0900
+++ checkpw-1.02/checkapoppw.c	2008-12-06 01:14:38.000000000 +0900
@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include <sys/stat.h>
 #include "error.h"
 #include "pathexec.h"
diff -Naur checkpw-1.02.orig/checkpw.c checkpw-1.02/checkpw.c
--- checkpw-1.02.orig/checkpw.c	2002-01-07 16:23:51.000000000 +0900
+++ checkpw-1.02/checkpw.c	2008-12-06 01:24:07.000000000 +0900
@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include <sys/stat.h>
 #include "error.h"
 #include "pathexec.h"