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
@@ -53,7 +53,7 @@
         int indexOfType(const QString &name) const;
 
         QList<QMimeType> m_mimeTypesList;
-        QVector<bool> checkedRows;
+        QVector<bool> m_checkedRows;
 };
 
 #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
@@ -32,7 +32,7 @@
     m_mimeTypesList = db.allMimeTypes();
     qStableSort(m_mimeTypesList.begin(), m_mimeTypesList.end(), lessThan);
 
-    checkedRows = QVector<bool>(m_mimeTypesList.size(), false);
+    m_checkedRows = QVector<bool>(m_mimeTypesList.size(), false);
 }
 
 MimeTypesModel::~MimeTypesModel()
@@ -70,7 +70,7 @@
         }
 
         case Qt::CheckStateRole:
-            return checkedRows.at(index.row()) ? Qt::Checked : Qt::Unchecked;
+            return m_checkedRows.at(index.row()) ? Qt::Checked : Qt::Unchecked;
     }
 
     return QVariant();
@@ -84,8 +84,8 @@
 
     if (role == Qt::CheckStateRole) {
         const bool newChecked = value.toBool();
-        if (checkedRows.at(index.row()) != newChecked) {
-            checkedRows[index.row()] = newChecked;
+        if (m_checkedRows.at(index.row()) != newChecked) {
+            m_checkedRows[index.row()] = newChecked;
             emit dataChanged(index, index, {role});
             emit checkedTypesChanged();
             return true;
@@ -97,7 +97,7 @@
 
 void MimeTypesModel::checkAll()
 {
-    checkedRows = QVector<bool>(m_mimeTypesList.size(), true);
+    m_checkedRows = QVector<bool>(m_mimeTypesList.size(), true);
 
     emit dataChanged(index(0, 0), index(m_mimeTypesList.size() - 1, 0));
 
@@ -118,8 +118,8 @@
 {
     QStringList list;
 
-    for (int i =0; i < checkedRows.size(); ++i) {
-        if (checkedRows.at(i)) {
+    for (int i =0; i < m_checkedRows.size(); ++i) {
+        if (m_checkedRows.at(i)) {
             list.append(m_mimeTypesList.at(i).name());
         }
     }
@@ -133,13 +133,13 @@
 
 void MimeTypesModel::setCheckedTypes(const QStringList &list)
 {
-    checkedRows = QVector<bool>(m_mimeTypesList.size(), false);
+    m_checkedRows = QVector<bool>(m_mimeTypesList.size(), false);
 
     foreach (const QString &name, list) {
         const int row = indexOfType(name);
 
         if (row != -1) {
-            checkedRows[row] = true;
+            m_checkedRows[row] = true;
         }
     }