diff --git a/src/commands/certifycertificatecommand.h b/src/commands/certifycertificatecommand.h
index a41670ba0..6a8111314 100644
--- a/src/commands/certifycertificatecommand.h
+++ b/src/commands/certifycertificatecommand.h
@@ -1,52 +1,52 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     commands/signcertificatecommand.h
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2008 Klarälvdalens Datakonsult AB
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include <commands/command.h>
 
 namespace GpgME
 {
 class UserID;
 }
 
 namespace Kleo
 {
 namespace Commands
 {
 
 class CertifyCertificateCommand : public Command
 {
     Q_OBJECT
 public:
     explicit CertifyCertificateCommand(QAbstractItemView *view, KeyListController *parent);
     explicit CertifyCertificateCommand(KeyListController *parent);
     explicit CertifyCertificateCommand(const GpgME::Key &key);
     explicit CertifyCertificateCommand(const GpgME::UserID &uid);
     explicit CertifyCertificateCommand(const std::vector<GpgME::UserID> &uids);
     ~CertifyCertificateCommand() override;
 
     /* reimp */ static Restrictions restrictions()
     {
-        return OnlyOneKey | MustBeOpenPGP;
+        return OnlyOneKey | MustBeOpenPGP | MustBeValid;
     }
 
 private:
     void doStart() override;
     void doCancel() override;
 
 private:
     class Private;
     inline Private *d_func();
     inline const Private *d_func() const;
 };
 
 }
 }