diff --git a/src/fileio.cpp b/src/fileio.cpp
index dfb79b1..3e533f9 100644
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -5,6 +5,7 @@
 */
 
 #include "fileio.h"
+#include <sys/types.h>
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
 #endif
@@ -17,6 +18,13 @@ void FILEIO::SetSaveDir(const char* savedir)
 	g_savedir = savedir;
 }
 
+int FILEIO::StatSavedata(const char* filename, struct stat* buf)
+{
+	_TCHAR path[_MAX_PATH];
+	_stprintf_s(path, _MAX_PATH, _T("%s%s"), g_savedir ? g_savedir : g_root, filename);
+	return stat(path, buf);
+}
+
 FILEIO::FILEIO()
 {
 	// ������
diff --git a/src/fileio.h b/src/fileio.h
index f477cc5..73d9fd4 100644
--- a/src/fileio.h
+++ b/src/fileio.h
@@ -8,6 +8,7 @@
 #define _FILEIO_H_
 
 #include <stdio.h>
+#include <sys/stat.h>
 #include "common.h"
 
 #define FILEIO_READ_BINARY 1
@@ -28,6 +29,7 @@ public:
 	~FILEIO();
 
 	static void SetSaveDir(const char* savedir);
+	static int StatSavedata(const char* filename, struct stat* buf);
 	bool Fopen(const _TCHAR *filename, int mode);
 	void Fclose();
 	uint32 Fseek(long offset, int origin);
diff --git a/src/sys/nact_sys3.cpp b/src/sys/nact_sys3.cpp
index 63021d0..e32e4d8 100644
--- a/src/sys/nact_sys3.cpp
+++ b/src/sys/nact_sys3.cpp
@@ -5,7 +5,6 @@
 */
 
 #include <time.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include "nact.h"
 #include "ags.h"
@@ -13,8 +12,6 @@
 #include "crc32.h"
 #include "../fileio.h"
 
-extern _TCHAR g_root[_MAX_PATH];
-
 void NACT::cmd_calc()
 {
 	int index = getd();
@@ -1602,13 +1599,12 @@ void NACT::cmd_y()
 			break;
 		case 239:
 			{
-				_TCHAR path[_MAX_PATH], file_path[_MAX_PATH];
+				_TCHAR path[_MAX_PATH];
 				_tcscpy_s(path, _MAX_PATH, _T("ASLEEP_A.DAT"));
 				path[7] = _T('A') + param - 1;
-				_stprintf_s(file_path, _MAX_PATH, _T("%s%s"), g_root, path);
 
 				struct stat statbuf;
-				if (stat(file_path, &statbuf) != -1) {
+				if (FILEIO::StatSavedata(path, &statbuf) != -1) {
 					struct tm *t = localtime(&statbuf.st_mtime);
 					D01 = t->tm_year + 1900;
 					D02 = t->tm_mon + 1;