diff --git a/extenders/extender.cpp b/extenders/extender.cpp
index e36419f34..dd51d7cff 100644
--- a/extenders/extender.cpp
+++ b/extenders/extender.cpp
@@ -649,7 +649,7 @@ void ExtenderPrivate::addExtenderItem(ExtenderItem *item, const QPointF &pos)
         return;
     }
 
-    QObject::connect(item, SIGNAL(destroyed(ExtenderItem*)), q, SLOT(extenderItemDestroyed(ExtenderItem*)));
+    QObject::connect(item, SIGNAL(destroyed(Plasma::ExtenderItem*)), q, SLOT(extenderItemDestroyed(Plasma::ExtenderItem*)));
     attachedExtenderItems.append(item);
     q->itemHoverLeaveEvent(item);
     pendingItems[item] = pos;
@@ -838,7 +838,7 @@ ExtenderGroup *ExtenderPrivate::findGroup(const QString &name) const
     return 0;
 }
 
-void ExtenderPrivate::extenderItemDestroyed(ExtenderItem *item)
+void ExtenderPrivate::extenderItemDestroyed(Plasma::ExtenderItem *item)
 {
     if (item && attachedExtenderItems.contains(item)) {
         removeExtenderItem(item);
diff --git a/extenders/extender.h b/extenders/extender.h
index 74f89d2f6..5e73f8a16 100644
--- a/extenders/extender.h
+++ b/extenders/extender.h
@@ -304,7 +304,7 @@ class PLASMA_EXPORT Extender : public QGraphicsWidget
         ExtenderPrivate *const d;
 
         Q_PRIVATE_SLOT(d, void delayItemAddedEvent())
-        Q_PRIVATE_SLOT(d, void extenderItemDestroyed(ExtenderItem *item))
+        Q_PRIVATE_SLOT(d, void extenderItemDestroyed(Plasma::ExtenderItem *item))
         Q_PRIVATE_SLOT(d, void viewportGeometryChanged(const QRectF &))
 
         friend class ExtenderPrivate;
diff --git a/extenders/extenderitem.h b/extenders/extenderitem.h
index 30d1c94e9..d1833ce1c 100644
--- a/extenders/extenderitem.h
+++ b/extenders/extenderitem.h
@@ -287,7 +287,7 @@ class PLASMA_EXPORT ExtenderItem : public QGraphicsWidget
          * Emitted when the extender item is destroyed
          * @since 4.4.1
          */
-        void destroyed(ExtenderItem *item);
+        void destroyed(Plasma::ExtenderItem *item);
 
     protected:
         void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);