diff --git a/containments/desktop/package/contents/ui/ConfigFilter.qml b/containments/desktop/package/contents/ui/ConfigFilter.qml
--- a/containments/desktop/package/contents/ui/ConfigFilter.qml
+++ b/containments/desktop/package/contents/ui/ConfigFilter.qml
@@ -35,10 +35,17 @@
     property alias cfg_filterPattern: filterPattern.text
     property alias cfg_filterMimeTypes: mimeTypesModel.checkedTypes
 
-    Folder.FilterableMimeTypesModel {
-        id: mimeTypesModel
+    PlasmaCore.SortFilterModel {
+        id: filderedMimeTypesModel
 
-        filter: mimeFilter.text
+        sourceModel: Folder.MimeTypesModel {
+            id: mimeTypesModel
+        }
+
+        // SortFilterModel doesn't have a case-sensitivity option
+        // but filterRegExp always causes case-insensitive sorting.
+        filterRegExp: mimeFilter.text
+        filterRole: "display"
     }
 
     ColumnLayout {
@@ -96,7 +103,7 @@
                 enabled: (filterMode.currentIndex > 0)
 
                 ListView {
-                    model: mimeTypesModel
+                    model: filderedMimeTypesModel
 
                     delegate: RowLayout {
                         CheckBox {
diff --git a/containments/desktop/plugins/folder/folderplugin.cpp b/containments/desktop/plugins/folder/folderplugin.cpp
--- a/containments/desktop/plugins/folder/folderplugin.cpp
+++ b/containments/desktop/plugins/folder/folderplugin.cpp
@@ -43,7 +43,7 @@
     qmlRegisterType<ItemViewAdapter>(uri, 0, 1, "ItemViewAdapter");
     qmlRegisterType<LabelGenerator>(uri, 0, 1, "LabelGenerator");
     qmlRegisterType<MenuHelper>(uri, 0, 1, "MenuHelper");
-    qmlRegisterType<FilterableMimeTypesModel>(uri, 0, 1, "FilterableMimeTypesModel");
+    qmlRegisterType<MimeTypesModel>(uri, 0, 1, "MimeTypesModel");
     qmlRegisterType<PlacesModel>(uri, 0, 1, "PlacesModel");
     qmlRegisterType<Positioner>(uri, 0, 1, "Positioner");
     qmlRegisterType<PreviewPluginsModel>(uri, 0, 1, "PreviewPluginsModel");
diff --git a/containments/desktop/plugins/folder/mimetypesmodel.h b/containments/desktop/plugins/folder/mimetypesmodel.h
--- a/containments/desktop/plugins/folder/mimetypesmodel.h
+++ b/containments/desktop/plugins/folder/mimetypesmodel.h
@@ -57,32 +57,4 @@
         QVector<bool> checkedRows;
 };
 
-class FilterableMimeTypesModel : public QSortFilterProxyModel
-{
-    Q_OBJECT
-
-    Q_PROPERTY(QStringList checkedTypes READ checkedTypes WRITE setCheckedTypes NOTIFY checkedTypesChanged)
-    Q_PROPERTY(QString filter READ filter WRITE setFilter NOTIFY filterChanged)
-
-    public:
-        FilterableMimeTypesModel(QObject *parent = 0);
-        ~FilterableMimeTypesModel();
-
-        Q_INVOKABLE void checkAll();
-
-        QStringList checkedTypes() const;
-        void setCheckedTypes(const QStringList &list);
-
-        QString filter() const;
-        void setFilter(const QString &filter);
-
-    Q_SIGNALS:
-        void checkedTypesChanged() const;
-        void filterChanged() const;
-
-    private:
-        MimeTypesModel *m_sourceModel;
-        QString m_filter;
-};
-
 #endif
diff --git a/containments/desktop/plugins/folder/mimetypesmodel.cpp b/containments/desktop/plugins/folder/mimetypesmodel.cpp
--- a/containments/desktop/plugins/folder/mimetypesmodel.cpp
+++ b/containments/desktop/plugins/folder/mimetypesmodel.cpp
@@ -147,48 +147,3 @@
 
     emit checkedTypesChanged();
 }
-
-FilterableMimeTypesModel::FilterableMimeTypesModel(QObject *parent) : QSortFilterProxyModel(parent),
-    m_sourceModel(new MimeTypesModel(this))
-{
-    setSourceModel(m_sourceModel);
-    setDynamicSortFilter(true);
-
-    connect(m_sourceModel, &MimeTypesModel::checkedTypesChanged, this, &FilterableMimeTypesModel::checkedTypesChanged);
-}
-
-FilterableMimeTypesModel::~FilterableMimeTypesModel()
-{
-}
-
-void FilterableMimeTypesModel::checkAll()
-{
-    m_sourceModel->checkAll();
-}
-
-QStringList FilterableMimeTypesModel::checkedTypes() const
-{
-    return m_sourceModel->checkedTypes();
-}
-
-void FilterableMimeTypesModel::setCheckedTypes(const QStringList &list)
-{
-    m_sourceModel->setCheckedTypes(list);
-}
-
-QString FilterableMimeTypesModel::filter() const
-{
-    return m_filter;
-}
-
-void FilterableMimeTypesModel::setFilter(const QString &filter)
-{
-    if (m_filter != filter) {
-        m_filter = filter;
-
-        setFilterFixedString(m_filter);
-
-        emit filterChanged();
-    }
-}
-