diff --git a/src/utils/keys.cpp b/src/utils/keys.cpp
index 6998a5e8f..0cdf00b0b 100644
--- a/src/utils/keys.cpp
+++ b/src/utils/keys.cpp
@@ -1,125 +1,127 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     utils/keys.cpp
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2022 g10 Code GmbH
     SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "keys.h"
 
+#include <kleopatra_debug.h>
+
 #include <Libkleo/Algorithm>
 #include <Libkleo/KeyCache>
 
 #include <QByteArray>
 
 // needed for GPGME_VERSION_NUMBER
 #include <gpgme.h>
 
 #include <algorithm>
 #include <iterator>
 
 namespace
 {
 bool isLastValidUserID(const GpgME::UserID &userId)
 {
     if (Kleo::isRevokedOrExpired(userId)) {
         return false;
     }
     const auto userIds = userId.parent().userIDs();
     const int numberOfValidUserIds = std::count_if(std::begin(userIds), std::end(userIds),
                                                    [](const auto &u) {
                                                        return !Kleo::isRevokedOrExpired(u);
                                                    });
     return numberOfValidUserIds == 1;
 }
 }
 
 bool Kleo::isSelfSignature(const GpgME::UserID::Signature &signature)
 {
     return !qstrcmp(signature.parent().parent().keyID(), signature.signerKeyID());
 }
 
 bool Kleo::isRevokedOrExpired(const GpgME::UserID &userId)
 {
     const auto sigs = userId.signatures();
     std::vector<GpgME::UserID::Signature> selfSigs;
     std::copy_if(std::begin(sigs), std::end(sigs), std::back_inserter(selfSigs), &Kleo::isSelfSignature);
     std::sort(std::begin(selfSigs), std::end(selfSigs));
     // check the most recent signature
     const auto sig = !selfSigs.empty() ? selfSigs.back() : GpgME::UserID::Signature{};
     return !sig.isNull() && (sig.isRevokation() || sig.isExpired());
 }
 
 bool Kleo::canCreateCertifications(const GpgME::Key &key)
 {
     return key.canCertify() && canBeUsedForSecretKeyOperations(key);
 }
 
 bool Kleo::canBeUsedForSecretKeyOperations(const GpgME::Key &key)
 {
 #if GPGME_VERSION_NUMBER >= 0x011102 // 1.17.2
     // we need to check the primary subkey because Key::hasSecret() is also true if just the secret key stub of an offline key is available
     return key.subkey(0).isSecret();
 #else
     // older versions of GpgME did not always set the secret flag for card keys
     return key.subkey(0).isSecret() || key.subkey(0).isCardKey();
 #endif
 }
 
 bool Kleo::canRevokeUserID(const GpgME::UserID &userId)
 {
     return (!userId.isNull() //
             && userId.parent().protocol() == GpgME::OpenPGP
             && !isLastValidUserID(userId));
 }
 
 bool Kleo::isSecretKeyStoredInKeyRing(const GpgME::Key &key)
 {
     return key.subkey(0).isSecret() && !key.subkey(0).isCardKey();
 }
 
 bool Kleo::userHasCertificationKey()
 {
     const auto secretKeys = KeyCache::instance()->secretKeys();
     return Kleo::any_of(secretKeys, [](const auto &k) {
         return (k.protocol() == GpgME::OpenPGP) && canCreateCertifications(k);
     });
 }
 
 Kleo::CertificationRevocationFeasibility Kleo::userCanRevokeCertification(const GpgME::UserID::Signature &certification)
 {
     const auto certificationKey = KeyCache::instance()->findByKeyIDOrFingerprint(certification.signerKeyID());
     const bool isSelfSignature = qstrcmp(certification.parent().parent().keyID(), certification.signerKeyID()) == 0;
     if (!certificationKey.hasSecret()) {
         return CertificationNotMadeWithOwnKey;
     } else if (isSelfSignature) {
         return CertificationIsSelfSignature;
     } else if (certification.isRevokation()) {
         return CertificationIsRevocation;
     } else if (certification.isExpired()) {
         return CertificationIsExpired;
     } else if (certification.isInvalid()) {
         return CertificationIsInvalid;
     } else if (!canCreateCertifications(certificationKey)) {
         return CertificationKeyNotAvailable;
     }
     return CertificationCanBeRevoked;
 }
 
 bool Kleo::userCanRevokeCertifications(const GpgME::UserID &userId)
 {
     if (userId.numSignatures() == 0) {
         qCWarning(KLEOPATRA_LOG) << __func__ << "- Error: Signatures of user ID" << QString::fromUtf8(userId.id()) << "not available";
     }
     return Kleo::any_of(userId.signatures(), [](const auto &certification) {
         return userCanRevokeCertification(certification) == CertificationCanBeRevoked;
     });
 }
 
 bool Kleo::userIDBelongsToKey(const GpgME::UserID &userID, const GpgME::Key &key)
 {
     return !qstricmp(userID.parent().primaryFingerprint(), key.primaryFingerprint());
 }