diff --git a/recentusagemodel.cpp b/recentusagemodel.cpp
index 8f1711c6e..bf3e4a691 100644
--- a/recentusagemodel.cpp
+++ b/recentusagemodel.cpp
@@ -97,6 +97,11 @@ bool InvalidAppsFilterProxy::filterAcceptsRow(int source_row, const QModelIndex
     return true;
 }
 
+bool InvalidAppsFilterProxy::lessThan(const QModelIndex &left, const QModelIndex &right) const
+{
+    return (left.row() < right.row());
+}
+
 bool GroupSortProxy::lessThan(const QModelIndex &left, const QModelIndex &right) const
 {
     const QString &lResource = sourceModel()->data(left, ResultModel::ResourceRole).toString();
diff --git a/recentusagemodel.h b/recentusagemodel.h
index 89b721518..49107e254 100644
--- a/recentusagemodel.h
+++ b/recentusagemodel.h
@@ -47,6 +47,7 @@ class InvalidAppsFilterProxy : public QSortFilterProxyModel
 
     protected:
         bool filterAcceptsRow(int source_row, const QModelIndex & source_parent) const Q_DECL_OVERRIDE;
+        bool lessThan(const QModelIndex &left, const QModelIndex &right) const override;
 
     private Q_SLOTS:
         void connectNewFavoritesModel();