diff --git a/include/ntapi/nt_istat.h b/include/ntapi/nt_istat.h
index 7ad02a3..497dc72 100644
--- a/include/ntapi/nt_istat.h
+++ b/include/ntapi/nt_istat.h
@@ -9,6 +9,7 @@
 #define NT_ISTAT_DEFAULT	0x00000000
 #define NT_ISTAT_COMMON		0x00000001
 #define NT_ISTAT_DEV_NAME_COPY	0x00000002
+#define NT_ISTAT_MUP_DEVICE	0x20000000
 #define NT_ISTAT_NEW_HANDLE	0x80000000
 
 typedef struct _nt_istat {
diff --git a/include/ntapi/nt_mount.h b/include/ntapi/nt_mount.h
index 0e0b979..e9b5dae 100644
--- a/include/ntapi/nt_mount.h
+++ b/include/ntapi/nt_mount.h
@@ -10,6 +10,10 @@
 #define __DEVICE_PATH_PREFIX_LEN	(8 * sizeof(wchar16_t))
 #define __DEVICE_PATH_PREFIX_HASH	(0xDA6FA40B)
 
+/* {'\\','D','e','v','i','c','e','\\','M','u','p','\\'} */
+#define __DEVICE_MUP_PREFIX_LEN		(12 * sizeof(wchar16_t))
+#define __DEVICE_MUP_PREFIX_HASH	(0x0CEBB5F6)
+
 /* {'\\','?','?','\\','V','o','l','u','m','e','{'} */
 #define __VOLUME_PATH_PREFIX_LEN	(11 * sizeof(wchar16_t))
 #define __VOLUME_PATH_PREFIX_HASH	(0xFEBA8529)
diff --git a/include/ntapi/nt_statfs.h b/include/ntapi/nt_statfs.h
index b57b418..9bb5ce1 100644
--- a/include/ntapi/nt_statfs.h
+++ b/include/ntapi/nt_statfs.h
@@ -10,6 +10,7 @@
 #define NT_STATFS_DEV_NAME_COPY		(0x00000002)
 #define NT_STATFS_VOLUME_GUID		(0x00000004)
 #define NT_STATFS_DOS_DRIVE_LETTER	NT_STATFS_VOLUME_GUID
+#define NT_STATFS_MUP_DEVICE		(0x20000000)
 #define NT_STATFS_NEW_HANDLE		(0x80000000)
 
 
diff --git a/src/fs/ntapi_tt_istat.c b/src/fs/ntapi_tt_istat.c
index bdfa09f..a42c8dd 100644
--- a/src/fs/ntapi_tt_istat.c
+++ b/src/fs/ntapi_tt_istat.c
@@ -28,13 +28,16 @@ int32_t __stdcall __ntapi_tt_istat(
 	nt_unicode_string *	sdev;
 	wchar16_t *		wch;
 	wchar16_t *		wch_mark;
+	uint32_t		hash;
 
 	/* validaton */
 	if (!hfile && !path)
 		return NT_STATUS_INVALID_HANDLE;
 
 	/* hfile */
-	if (!hfile) {
+	if (hfile) {
+		istat->flags_out = 0;
+	} else {
 		/* oa */
 		oa.len = sizeof(nt_oa);
 		oa.root_dir = hroot;
@@ -104,15 +107,25 @@ int32_t __stdcall __ntapi_tt_istat(
 			|| (wch[7] != '\\'))
 		return NT_STATUS_INVALID_HANDLE;
 
-	wch_mark = &wch[8];
-	wch      = wch_mark;
+	if ((sdev->strlen >= __DEVICE_MUP_PREFIX_LEN)
+			&& (wch[8]=='M')
+			&& (wch[9]=='u')
+			&& (wch[10]=='p')
+			&& (wch[11]=='\\')) {
+		istat->flags_out |= NT_STATFS_MUP_DEVICE;
+		wch_mark = &wch[12];
+		hash     = __DEVICE_MUP_PREFIX_HASH;
+	} else {
+		wch_mark = &wch[8];
+		hash     = __DEVICE_PATH_PREFIX_HASH;
+	}
 
-	while (*wch != '\\')
-		wch++;
+	for (wch=wch_mark; *wch!='\\'; wch++)
+		(void)0;
 
 	istat->dev_name_strlen = (uint16_t)((wch - sdev->buffer) * sizeof(uint16_t));
 	istat->dev_name_hash   = __ntapi->tt_buffer_crc32(
-		__DEVICE_PATH_PREFIX_HASH,
+		hash,
 		wch_mark,
 		(uintptr_t)wch - (uintptr_t)wch_mark);
 
diff --git a/src/fs/ntapi_tt_statfs.c b/src/fs/ntapi_tt_statfs.c
index b386c8b..8b2285a 100644
--- a/src/fs/ntapi_tt_statfs.c
+++ b/src/fs/ntapi_tt_statfs.c
@@ -26,6 +26,8 @@ int32_t __stdcall __ntapi_tt_statfs(
 	wchar16_t *		wch;
 	wchar16_t *		wch_mark;
 	uint32_t		offset;
+	uint32_t		fmup;
+	uint32_t		hash;
 	void *			mnt_points_buffer;
 	nt_mount_points *	mnt_points;
 	nt_fsai *		fsai;
@@ -38,7 +40,9 @@ int32_t __stdcall __ntapi_tt_statfs(
 		return NT_STATUS_INVALID_HANDLE;
 
 	/* hfile */
-	if (!hfile) {
+	if (hfile) {
+		statfs->flags_out = 0;
+	} else {
 		/* oa */
 		oa.len = sizeof(nt_oa);
 		oa.root_dir = hroot;
@@ -151,17 +155,30 @@ int32_t __stdcall __ntapi_tt_statfs(
 			|| (wch[7] != '\\'))
 		return NT_STATUS_INVALID_HANDLE;
 
-	wch_mark = &wch[8];
-	wch      = wch_mark;
+	if (sdev->strlen < __DEVICE_MUP_PREFIX_LEN)
+		fmup = 0;
+	else if ((wch[8]=='M') && (wch[9]=='u') && (wch[10]=='p') && (wch[11]=='\\'))
+		fmup = NT_STATFS_MUP_DEVICE;
+	else
+		fmup = 0;
+
+	if (fmup) {
+		wch_mark = &wch[8];
+		hash     = __DEVICE_MUP_PREFIX_HASH;
+		flags   &= ~NT_STATFS_VOLUME_GUID;
+	} else {
+		wch_mark = &wch[8];
+		hash     = __DEVICE_PATH_PREFIX_HASH;
+	}
 
-	while (*wch != '\\')
-		wch++;
+	for (wch=wch_mark; *wch!='\\'; wch++)
+		(void)0;
 
 	statfs->dev_name_strlen    = (uint16_t)((wch - sdev->buffer) * sizeof(uint16_t));
 	statfs->record_name_strlen = sdev->strlen - statfs->dev_name_strlen;
 
 	statfs->dev_name_hash = __ntapi->tt_buffer_crc32(
-		__DEVICE_PATH_PREFIX_HASH,
+		hash,
 		wch_mark,
 		sizeof(wchar16_t) * (wch - wch_mark));
 
@@ -186,7 +203,7 @@ int32_t __stdcall __ntapi_tt_statfs(
 	/* f_flags, nt_attr, nt_control_flags (todo?) */
 	statfs->f_flags = 0;
 	statfs->nt_attr = 0;
-	statfs->nt_control_flags = 0;
+	statfs->nt_control_flags = fmup;
 	statfs->nt_padding = 0;
 
 	if (!(flags & NT_STATFS_VOLUME_GUID)) {