diff --git a/src/conf/appearanceconfigpage.h b/src/conf/appearanceconfigpage.h
index a42765e2c..24416ae82 100644
--- a/src/conf/appearanceconfigpage.h
+++ b/src/conf/appearanceconfigpage.h
@@ -1,39 +1,39 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     conf/appearanceconfigpage.h
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2004, 2008 Klarälvdalens Datakonsult AB
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 #include <KCModule>
 namespace Kleo
 {
 namespace Config
 {
 
 class AppearanceConfigWidget;
 
 /**
  * "Appearance" configuration page for kleopatra's configuration dialog
  */
 class AppearanceConfigurationPage : public KCModule
 {
     Q_OBJECT
 public:
     explicit AppearanceConfigurationPage(QObject *parent, const KPluginMetaData &data = {}, const QVariantList &args = QVariantList());
 
 public Q_SLOTS:
     void load() override;
     void save() override;
     void defaults() override;
 
 private:
-    AppearanceConfigWidget *mWidget;
+    AppearanceConfigWidget *mWidget = nullptr;
 };
 
 }
 }
 
diff --git a/src/conf/cryptooperationsconfigpage.h b/src/conf/cryptooperationsconfigpage.h
index 0650fdee3..37581e9ee 100644
--- a/src/conf/cryptooperationsconfigpage.h
+++ b/src/conf/cryptooperationsconfigpage.h
@@ -1,39 +1,39 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     conf/cryptooperationsconfigpage.h
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 #include <KCModule>
 namespace Kleo
 {
 namespace Config
 {
 
 class CryptoOperationsConfigWidget;
 
 /**
  * "Crypto Operations" configuration page for kleopatra's configuration dialog
  */
 class CryptoOperationsConfigurationPage : public KCModule
 {
     Q_OBJECT
 public:
     explicit CryptoOperationsConfigurationPage(QObject *parent, const KPluginMetaData &data = {}, const QVariantList &args = QVariantList());
 
 public Q_SLOTS:
     void load() override;
     void save() override;
     void defaults() override;
 
 private:
-    CryptoOperationsConfigWidget *mWidget;
+    CryptoOperationsConfigWidget *mWidget = nullptr;
 };
 
 }
 }
 
diff --git a/src/conf/gnupgsystemconfigurationpage.h b/src/conf/gnupgsystemconfigurationpage.h
index 24753edc5..540d2e573 100644
--- a/src/conf/gnupgsystemconfigurationpage.h
+++ b/src/conf/gnupgsystemconfigurationpage.h
@@ -1,39 +1,39 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     conf/gnupgsystemconfigurationpage.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 <KCModule>
 namespace Kleo
 {
 class CryptoConfigModule;
 }
 
 namespace Kleo
 {
 namespace Config
 {
 
 class GnuPGSystemConfigurationPage : public KCModule
 {
     Q_OBJECT
 public:
     explicit GnuPGSystemConfigurationPage(QObject *parent, const KPluginMetaData &data = {}, const QVariantList &args = QVariantList());
     ~GnuPGSystemConfigurationPage() override;
 
 public Q_SLOTS:
     void load() override;
     void save() override;
     void defaults() override;
 
 private:
-    Kleo::CryptoConfigModule *mWidget;
+    Kleo::CryptoConfigModule *mWidget = nullptr;
 };
 
 }
 }
 
diff --git a/src/conf/smimevalidationconfigurationpage.h b/src/conf/smimevalidationconfigurationpage.h
index 888dc6160..63d3ae6d5 100644
--- a/src/conf/smimevalidationconfigurationpage.h
+++ b/src/conf/smimevalidationconfigurationpage.h
@@ -1,34 +1,34 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     conf/smimevalidationconfigurationpage.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 <KCModule>
 namespace Kleo
 {
 namespace Config
 {
 
 class SMimeValidationConfigurationWidget;
 
 class SMimeValidationConfigurationPage : public KCModule
 {
     Q_OBJECT
 public:
     explicit SMimeValidationConfigurationPage(QObject *parent, const KPluginMetaData &data = {}, const QVariantList &args = QVariantList());
 public Q_SLOTS:
     void load() override;
     void save() override;
     void defaults() override;
 
 private:
-    SMimeValidationConfigurationWidget *mWidget;
+    SMimeValidationConfigurationWidget *mWidget = nullptr;
 };
 
 }
 }