diff --git a/widgets/treeview.cpp b/widgets/treeview.cpp
index 7bd44e6fb..067f6c1c8 100644
--- a/widgets/treeview.cpp
+++ b/widgets/treeview.cpp
@@ -27,6 +27,8 @@
 
 #include "private/style.h"
 
+namespace Plasma
+{
 
 class TreeViewPrivate
 {
@@ -47,9 +49,7 @@ TreeView::TreeView(QGraphicsWidget *parent)
     QTreeView* native = new QTreeView;
     setWidget(native);
     native->setAttribute(Qt::WA_NoSystemBackground);
-    native->viewport()->setAutoFillBackground(false);
     native->setFrameStyle(QFrame::NoFrame);
-    native->setIconSize(QSize(KIconLoader::SizeSmallMedium, KIconLoader::SizeSmallMedium));
 
     Plasma::Style *style = new Plasma::Style();
     native->verticalScrollBar()->setStyle(style);
@@ -86,5 +86,7 @@ QTreeView* TreeView::nativeWidget() const
     return static_cast<QTreeView*>(widget());
 }
 
+};
+
 #include <treeview.moc>
 
diff --git a/widgets/treeview.h b/widgets/treeview.h
index 892471e92..5cde9ac69 100644
--- a/widgets/treeview.h
+++ b/widgets/treeview.h
@@ -23,13 +23,17 @@
 
 #include <QtGui/QGraphicsProxyWidget>
 
+#include <plasma/plasma_export.h>
+
 class QTreeView;
 class QAbstractItemModel;
 
+namespace Plasma
+{
 
 class TreeViewPrivate;
 
-class TreeView : public QGraphicsProxyWidget
+class PLASMA_EXPORT TreeView : public QGraphicsProxyWidget
 {
     Q_OBJECT
 
@@ -75,4 +79,5 @@ private:
     TreeViewPrivate * const d;
 };
 
+};
 #endif // multiple inclusion guard