diff --git a/animations/animation.h b/animations/animation.h
index 764646281..56354ec9a 100644
--- a/animations/animation.h
+++ b/animations/animation.h
@@ -47,6 +47,7 @@ class PLASMA_EXPORT Animation : public QAbstractAnimation
 {
 
     Q_OBJECT
+    Q_ENUMS(Reference)
     Q_PROPERTY(int duration READ duration WRITE setDuration)
     Q_PROPERTY(QEasingCurve::Type easingCurveType READ easingCurveType WRITE setEasingCurveType)
     Q_PROPERTY(QGraphicsWidget *targetWidget READ targetWidget WRITE setTargetWidget)