diff --git a/src/libkleopatraclient/core/command_p.h b/src/libkleopatraclient/core/command_p.h
index 14b57a29a..189cfd491 100644
--- a/src/libkleopatraclient/core/command_p.h
+++ b/src/libkleopatraclient/core/command_p.h
@@ -1,77 +1,77 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     command_p.h
 
     This file is part of KleopatraClient, the Kleopatra interface library
     SPDX-FileCopyrightText: 2008 Klarälvdalens Datakonsult AB
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 #ifndef __LIBKLEOPATRACLIENT_CORE_COMMAND_P_H__
 #define __LIBKLEOPATRACLIENT_CORE_COMMAND_P_H__
 
 #include "command.h"
 
 #include <QThread>
-#include <QMutex>
+#include <QRecursiveMutex>
 
 #include <QString>
 #include <QStringList>
 #include <QByteArray>
 #include <QVariant>
 
 #include <map>
 #include <string>
 
 class KleopatraClientCopy::Command::Private : public QThread
 {
     Q_OBJECT
 private:
     friend class ::KleopatraClientCopy::Command;
     Command *const q;
 public:
     explicit Private(Command *qq)
         : QThread(),
           q(qq),
-          mutex(QMutex::Recursive),
+          mutex(),
           inputs(),
           outputs()
     {
 
     }
     ~Private() override {}
 
 private:
     void init();
 
 private:
     void run() override;
 
 private:
-    QMutex mutex;
+    QRecursiveMutex mutex;
     struct Option {
         QVariant value;
         bool hasValue : 1;
         bool isCritical : 1;
     };
     struct Inputs {
         Inputs() : parentWId(0), areRecipientsInformative(false), areSendersInformative(false) {}
         std::map<std::string, Option> options;
         QStringList filePaths;
         QStringList recipients, senders;
         std::map<std::string, QByteArray> inquireData;
         WId parentWId;
         QByteArray command;
         bool areRecipientsInformative : 1;
         bool areSendersInformative    : 1;
     } inputs;
     struct Outputs {
         Outputs() : canceled(false), serverPid(0) {}
         QString errorString;
         bool canceled : 1;
         QByteArray data;
         qint64 serverPid;
         QString serverLocation;
     } outputs;
 };
 
 #endif /* __LIBKLEOPATRACLIENT_CORE_COMMAND_P_H__ */