diff --git a/src/kcm/module.h b/src/kcm/module.h
index 3bb6e85..66886d8 100644
--- a/src/kcm/module.h
+++ b/src/kcm/module.h
@@ -1,49 +1,44 @@
 /*
     Copyright 2014-2015 Harald Sitter <sitter@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) version 3, or any
     later version accepted by the membership of KDE e.V. (or its
     successor approved by the membership of KDE e.V.), which shall
     act as a proxy defined in Section 6 of version 3 of the license.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef MODULE_H
 #define MODULE_H
 
 #include <KQuickAddons/ConfigModule>
 
-class CardModel;
 class Context;
-class SinkInputModel;
-class SinkModel;
-class SourceModel;
-class SourceOutputModel;
 
 class KCMPulseAudio : public KQuickAddons::ConfigModule
 {
     Q_OBJECT
 public:
     KCMPulseAudio(QObject *parent, const QVariantList &args);
     ~KCMPulseAudio() override;
 
 public Q_SLOTS:
     void defaults() final;
     void load() final;
     void save() final;
 
 private:
     Context *m_context;
 };
 
 #endif // MODULE_H