diff --git a/include/ntapi/nt_istat.h b/include/ntapi/nt_istat.h
index 497dc72..df87838 100644
--- a/include/ntapi/nt_istat.h
+++ b/include/ntapi/nt_istat.h
@@ -16,8 +16,7 @@ typedef struct _nt_istat {
 	void *		hfile;
 	nt_fii		fii;
 	nt_ftagi	ftagi;
-	uint32_t	flags_in;
-	uint32_t	flags_out;
+	uint32_t	flags;
 	uint32_t	dev_name_hash;
 	uint16_t	dev_name_strlen;
 	uint16_t	dev_name_maxlen;
diff --git a/src/fs/ntapi_tt_istat.c b/src/fs/ntapi_tt_istat.c
index a42c8dd..00766ed 100644
--- a/src/fs/ntapi_tt_istat.c
+++ b/src/fs/ntapi_tt_istat.c
@@ -30,13 +30,15 @@ int32_t __stdcall __ntapi_tt_istat(
 	wchar16_t *		wch_mark;
 	uint32_t		hash;
 
+	(void)flags;
+
 	/* validaton */
 	if (!hfile && !path)
-		return NT_STATUS_INVALID_HANDLE;
+		return NT_STATUS_INVALID_PARAMETER;
 
 	/* hfile */
 	if (hfile) {
-		istat->flags_out = 0;
+		istat->flags = 0;
 	} else {
 		/* oa */
 		oa.len = sizeof(nt_oa);
@@ -58,11 +60,10 @@ int32_t __stdcall __ntapi_tt_istat(
 				open_options | NT_FILE_SYNCHRONOUS_IO_ALERT)))
 			return status;
 
-		istat->flags_out = NT_STAT_NEW_HANDLE;
+		istat->flags = NT_STAT_NEW_HANDLE;
 	}
 
-	istat->hfile    = hfile;
-	istat->flags_in = flags;
+	istat->hfile = hfile;
 
 	/* file index number */
 	if ((status = __ntapi->zw_query_information_file(
@@ -112,9 +113,9 @@ int32_t __stdcall __ntapi_tt_istat(
 			&& (wch[9]=='u')
 			&& (wch[10]=='p')
 			&& (wch[11]=='\\')) {
-		istat->flags_out |= NT_STATFS_MUP_DEVICE;
 		wch_mark = &wch[12];
 		hash     = __DEVICE_MUP_PREFIX_HASH;
+		istat->flags |= NT_STATFS_MUP_DEVICE;
 	} else {
 		wch_mark = &wch[8];
 		hash     = __DEVICE_PATH_PREFIX_HASH;