diff --git a/src/fs/unknown.cpp b/src/fs/unknown.cpp
index 3f6e27f..173d596 100644
--- a/src/fs/unknown.cpp
+++ b/src/fs/unknown.cpp
@@ -1,33 +1,36 @@
 /*************************************************************************
  *  Copyright (C) 2008 by Volker Lanz <vl@fidra.de>                      *
  *                                                                       *
  *  This program is free software; you can redistribute it and/or        *
  *  modify it under the terms of the GNU General Public License as       *
  *  published by the Free Software Foundation; either version 3 of       *
  *  the License, or (at your option) any later version.                  *
  *                                                                       *
  *  This program is distributed in the hope that it will be useful,      *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
  *  GNU General Public License for more details.                         *
  *                                                                       *
  *  You should have received a copy of the GNU General Public License    *
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.*
  *************************************************************************/
 
 #include "fs/unknown.h"
 
 namespace FS
 {
+
+FileSystem::CommandSupportType unknown::m_Move = FileSystem::cmdSupportNone;
+
 unknown::unknown(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label) :
     FileSystem(firstsector, lastsector, sectorsused, label, FileSystem::Type::Unknown)
 {
 }
 
 bool unknown::canMount(const QString & deviceNode, const QString & mountPoint) const
 {
     Q_UNUSED(deviceNode)
     Q_UNUSED(mountPoint)
     return false;
 }
 }
diff --git a/src/fs/unknown.h b/src/fs/unknown.h
index 3d20d67..cf87ca4 100644
--- a/src/fs/unknown.h
+++ b/src/fs/unknown.h
@@ -1,46 +1,51 @@
 /*************************************************************************
  *  Copyright (C) 2008 by Volker Lanz <vl@fidra.de>                      *
  *                                                                       *
  *  This program is free software; you can redistribute it and/or        *
  *  modify it under the terms of the GNU General Public License as       *
  *  published by the Free Software Foundation; either version 3 of       *
  *  the License, or (at your option) any later version.                  *
  *                                                                       *
  *  This program is distributed in the hope that it will be useful,      *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
  *  GNU General Public License for more details.                         *
  *                                                                       *
  *  You should have received a copy of the GNU General Public License    *
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.*
  *************************************************************************/
 
-#if !defined(KPMCORE_UNKNOWN_H)
-
+#ifndef KPMCORE_UNKNOWN_H
 #define KPMCORE_UNKNOWN_H
 
 #include "util/libpartitionmanagerexport.h"
 
 #include "fs/filesystem.h"
 
 #include <QtGlobal>
 
 namespace FS
 {
 /** A pseudo file system for partitions whose file system we cannot determine.
     @author Volker Lanz <vl@fidra.de>
 */
 class LIBKPMCORE_EXPORT unknown : public FileSystem
 {
 public:
     unknown(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label);
 
 public:
     bool supportToolFound() const override {
         return true;
     }
     bool canMount(const QString & deviceNode, const QString & mountPoint) const override;
+
+    CommandSupportType supportMove() const override {
+        return m_Move;
+    }
+
+    static CommandSupportType m_Move;
 };
 }
 
 #endif