diff --git a/clients/aurorae/src/aurorae.cpp b/clients/aurorae/src/aurorae.cpp
index ed8c436475..28fe937c66 100644
--- a/clients/aurorae/src/aurorae.cpp
+++ b/clients/aurorae/src/aurorae.cpp
@@ -38,9 +38,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 namespace Aurorae
 {
 
-AuroraeFactory::AuroraeFactory()
-        : QObject()
-        , KDecorationFactory()
+AuroraeFactory::AuroraeFactory(QObject *parent)
+        : KDecorationFactory(parent)
         , m_theme(new AuroraeTheme(this))
         , m_engine(new QDeclarativeEngine(this))
         , m_component(new QDeclarativeComponent(m_engine, this))
diff --git a/clients/aurorae/src/aurorae.h b/clients/aurorae/src/aurorae.h
index eaf9725a1a..6ba1c2d50a 100644
--- a/clients/aurorae/src/aurorae.h
+++ b/clients/aurorae/src/aurorae.h
@@ -37,7 +37,7 @@ namespace Aurorae
 class AuroraeTheme;
 class AuroraeClient;
 
-class AuroraeFactory :  public QObject, public KDecorationFactory
+class AuroraeFactory :  public KDecorationFactory
 {
     Q_OBJECT
 public:
@@ -62,7 +62,7 @@ private:
         AuroraeEngine,
         QMLEngine
     };
-    AuroraeFactory();
+    explicit AuroraeFactory(QObject *parent = nullptr);
     void init();
     void initAurorae(KConfig &conf, KConfigGroup &group);
     void initQML(const KConfigGroup& group);
diff --git a/clients/oxygen/oxygenfactory.cpp b/clients/oxygen/oxygenfactory.cpp
index a9d53bfe3b..718ffb44e1 100644
--- a/clients/oxygen/oxygenfactory.cpp
+++ b/clients/oxygen/oxygenfactory.cpp
@@ -40,7 +40,8 @@ namespace Oxygen
 {
 
     //___________________________________________________
-    Factory::Factory():
+    Factory::Factory(QObject *parent):
+        KDecorationFactory(parent),
         _initialized( false ),
         _helper(),
         _shadowCache( _helper )
diff --git a/clients/oxygen/oxygenfactory.h b/clients/oxygen/oxygenfactory.h
index a3e517c62f..25dbae2af7 100644
--- a/clients/oxygen/oxygenfactory.h
+++ b/clients/oxygen/oxygenfactory.h
@@ -54,7 +54,7 @@ namespace Oxygen
     };
 
     //! window decoration factory
-    class Factory: public QObject, public KDecorationFactory
+    class Factory: public KDecorationFactory
     {
 
         Q_OBJECT
@@ -62,7 +62,7 @@ namespace Oxygen
         public:
 
         //! constructor
-        Factory();
+        explicit Factory(QObject *parent = nullptr);
 
         //! destructor
         virtual ~Factory();
diff --git a/libkdecorations/kdecorationfactory.cpp b/libkdecorations/kdecorationfactory.cpp
index 7fb2d087ce..8aa0ff62a5 100644
--- a/libkdecorations/kdecorationfactory.cpp
+++ b/libkdecorations/kdecorationfactory.cpp
@@ -36,7 +36,9 @@ public:
     Qt::Corner closeButtonCorner;
 };
 
-KDecorationFactory::KDecorationFactory() : d(new KDecorationFactoryPrivate)
+KDecorationFactory::KDecorationFactory(QObject *parent)
+    : QObject(parent)
+    , d(new KDecorationFactoryPrivate)
 {
 }
 
diff --git a/libkdecorations/kdecorationfactory.h b/libkdecorations/kdecorationfactory.h
index c621cb8f4f..7b40f93fe2 100644
--- a/libkdecorations/kdecorationfactory.h
+++ b/libkdecorations/kdecorationfactory.h
@@ -35,14 +35,15 @@ class KDecorationBridge;
 class KDecorationFactoryPrivate;
 
 class KWIN_EXPORT KDecorationFactory
-    : public KDecorationDefines
+    : public QObject, public KDecorationDefines
 {
+    Q_OBJECT
 public:
     /**
      * Constructor. Called after loading the decoration plugin. All global
      * initialization of the plugin should be done in the factory constructor.
      */
-    KDecorationFactory();
+    explicit KDecorationFactory(QObject *parent = nullptr);
     /**
      * Destructor. Called before unloading the decoration plugin. All global
      * cleanup of the plugin should be done in the factory destructor.