diff --git a/src/kleo/keyresolvercore.h b/src/kleo/keyresolvercore.h
index 9f2321f47..ce0902b73 100644
--- a/src/kleo/keyresolvercore.h
+++ b/src/kleo/keyresolvercore.h
@@ -1,85 +1,85 @@
 /*  -*- c++ -*-
     kleo/keyresolvercore.h
 
     This file is part of libkleopatra, the KDE keymanagement library
     SPDX-FileCopyrightText: 2018 Intevation GmbH
     SPDX-FileCopyrightText: 2021 g10 Code GmbH
     SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include "kleo_export.h"
 
 #include <Libkleo/KeyResolver>
 
 #include <QMap>
 #include <QStringList>
 
 #include <gpgme++/global.h>
 
 #include <memory>
 #include <vector>
 
 class QString;
 
 namespace GpgME
 {
 class Key;
 }
 
 namespace Kleo
 {
 
 class KLEO_EXPORT KeyResolverCore
 {
 public:
     enum SolutionFlags {
         // clang-format off
         SomeUnresolved = 0,
         AllResolved    = 1,
 
         OpenPGPOnly    = 2,
         CMSOnly        = 4,
         MixedProtocols = OpenPGPOnly | CMSOnly,
 
         Error          = 0x1000,
 
         ResolvedMask   = AllResolved | Error,
         ProtocolsMask  = OpenPGPOnly | CMSOnly | Error,
         // clang-format on
     };
     struct Result {
         SolutionFlags flags;
         KeyResolver::Solution solution;
         KeyResolver::Solution alternative;
     };
 
     explicit KeyResolverCore(bool encrypt, bool sign, GpgME::Protocol format = GpgME::UnknownProtocol);
-    ~KeyResolverCore();
+    virtual ~KeyResolverCore();
 
     void setSender(const QString &sender);
     QString normalizedSender() const;
 
     void setRecipients(const QStringList &addresses);
 
     void setSigningKeys(const QStringList &fingerprints);
 
     void setOverrideKeys(const QMap<GpgME::Protocol, QMap<QString, QStringList>> &overrides);
 
     void setAllowMixedProtocols(bool allowMixed);
 
     void setPreferredProtocol(GpgME::Protocol proto);
 
     void setMinimumValidity(int validity);
 
-    Result resolve();
+    virtual Result resolve();
 
 private:
     class Private;
     std::unique_ptr<Private> d;
 };
 
 } // namespace Kleo