diff --git a/libkwineffects/kwineffects.h b/libkwineffects/kwineffects.h
index 3f328aaab6..1a6c7fce1e 100644
--- a/libkwineffects/kwineffects.h
+++ b/libkwineffects/kwineffects.h
@@ -69,7 +69,7 @@ class ScreenPaintData;
 
 typedef QPair< QString, Effect* > EffectPair;
 typedef QPair< Effect*, Window > InputWindowPair;
-typedef QList< EffectWindow* > EffectWindowList;
+typedef QList< KWin::EffectWindow* > EffectWindowList;
 
 
 /** @defgroup kwineffects KWin effects library
@@ -596,7 +596,7 @@ class KWIN_EXPORT EffectsHandler : public QObject
      * if used manually.
      */
     Q_PROPERTY(qreal animationTimeFactor READ animationTimeFactor)
-    Q_PROPERTY(EffectWindowList stackingOrder READ stackingOrder)
+    Q_PROPERTY(QList< KWin::EffectWindow* > stackingOrder READ stackingOrder)
     /**
      * Whether window decorations use the alpha channel.
      **/
@@ -2373,6 +2373,7 @@ void Motion<T>::finish()
 
 } // namespace
 Q_DECLARE_METATYPE(KWin::EffectWindow*)
+Q_DECLARE_METATYPE(QList<KWin::EffectWindow*>)
 
 /** @} */
 
diff --git a/scripting/scriptedeffect.cpp b/scripting/scriptedeffect.cpp
index 978ecb2764..1aa1627a75 100644
--- a/scripting/scriptedeffect.cpp
+++ b/scripting/scriptedeffect.cpp
@@ -152,6 +152,7 @@ bool ScriptedEffect::init(const QString &effectName, const QString &pathToScript
     MetaScripting::registration(m_engine);
     qScriptRegisterMetaType<KEffectWindowRef>(m_engine, effectWindowToScriptValue, effectWindowFromScriptValue);
     qScriptRegisterMetaType<KWin::FPx2>(m_engine, fpx2ToScriptValue, fpx2FromScriptValue);
+    qScriptRegisterSequenceMetaType<QList< KWin::EffectWindow* > >(m_engine);
     // add our print
     QScriptValue printFunc = m_engine->newFunction(kwinEffectScriptPrint);
     printFunc.setData(m_engine->newQObject(this));