diff --git a/searchdialog/kmsearchfilterproxymodel.h b/searchdialog/kmsearchfilterproxymodel.h
index 4bd2273aa..be358d1f4 100644
--- a/searchdialog/kmsearchfilterproxymodel.h
+++ b/searchdialog/kmsearchfilterproxymodel.h
@@ -41,7 +41,7 @@ public:
     explicit KMSearchFilterProxyModel(QObject *parent);
     ~KMSearchFilterProxyModel();
 protected:
-    bool lessThan(const QModelIndex &left, const QModelIndex &right) const;
+    bool lessThan(const QModelIndex &left, const QModelIndex &right) const Q_DECL_OVERRIDE;
 };
 }
 
diff --git a/searchdialog/kmsearchmessagemodel.h b/searchdialog/kmsearchmessagemodel.h
index b4ae067d6..cea81c2aa 100644
--- a/searchdialog/kmsearchmessagemodel.h
+++ b/searchdialog/kmsearchmessagemodel.h
@@ -48,10 +48,10 @@ public:
     explicit KMSearchMessageModel(QObject *parent = 0);
     ~KMSearchMessageModel();
 
-    int columnCount(const QModelIndex &parent = QModelIndex()) const;
-    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const Q_DECL_OVERRIDE;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const Q_DECL_OVERRIDE;
 
-    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
+    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const Q_DECL_OVERRIDE;
 
 };
 
diff --git a/searchdialog/searchdescriptionattribute.h b/searchdialog/searchdescriptionattribute.h
index fee7c7de3..6a9fb5059 100644
--- a/searchdialog/searchdescriptionattribute.h
+++ b/searchdialog/searchdescriptionattribute.h
@@ -42,10 +42,10 @@ public:
     void setListCollection(const QList<Akonadi::Collection::Id> &col);
     QList<Akonadi::Collection::Id> listCollection() const;
 
-    QByteArray type() const;
-    Attribute *clone() const;
-    QByteArray serialized() const;
-    void deserialize(const QByteArray &data);
+    QByteArray type() const Q_DECL_OVERRIDE;
+    Attribute *clone() const Q_DECL_OVERRIDE;
+    QByteArray serialized() const Q_DECL_OVERRIDE;
+    void deserialize(const QByteArray &data) Q_DECL_OVERRIDE;
 
 private:
     QList<Akonadi::Collection::Id> mListCollection;
diff --git a/searchdialog/searchwindow.h b/searchdialog/searchwindow.h
index 738e47da7..0a36913cf 100644
--- a/searchdialog/searchwindow.h
+++ b/searchdialog/searchwindow.h
@@ -111,10 +111,10 @@ public:
 
 protected:
     /** Reimplemented to react to Escape. */
-    void keyPressEvent(QKeyEvent *);
+    void keyPressEvent(QKeyEvent *) Q_DECL_OVERRIDE;
 
     /** Reimplemented to stop searching when the window is closed */
-    void closeEvent(QCloseEvent *);
+    void closeEvent(QCloseEvent *) Q_DECL_OVERRIDE;
 
     void createSearchModel();
 
diff --git a/widgets/collectionpane.h b/widgets/collectionpane.h
index 9b4a5659b..14e400c76 100644
--- a/widgets/collectionpane.h
+++ b/widgets/collectionpane.h
@@ -29,8 +29,8 @@ public:
     explicit CollectionPane(bool restoreSession, QAbstractItemModel *model, QItemSelectionModel *selectionModel, QWidget *parent = 0);
     ~CollectionPane();
 
-    MessageList::StorageModel *createStorageModel(QAbstractItemModel *model, QItemSelectionModel *selectionModel, QObject *parent);
-    void writeConfig(bool restoreSession);
+    MessageList::StorageModel *createStorageModel(QAbstractItemModel *model, QItemSelectionModel *selectionModel, QObject *parent) Q_DECL_OVERRIDE;
+    void writeConfig(bool restoreSession) Q_DECL_OVERRIDE;
 };
 
 class CollectionStorageModel : public MessageList::StorageModel
@@ -42,7 +42,7 @@ public:
     */
     explicit CollectionStorageModel(QAbstractItemModel *model, QItemSelectionModel *selectionModel, QObject *parent = 0);
     ~CollectionStorageModel();
-    bool isOutBoundFolder(const Akonadi::Collection &c) const;
+    bool isOutBoundFolder(const Akonadi::Collection &c) const Q_DECL_OVERRIDE;
 };
 
 #endif /* COLLECTIONPANE_H */
diff --git a/widgets/statusbarlabeltoggledstate.h b/widgets/statusbarlabeltoggledstate.h
index 2f936ef98..c19e2c6e8 100644
--- a/widgets/statusbarlabeltoggledstate.h
+++ b/widgets/statusbarlabeltoggledstate.h
@@ -36,7 +36,7 @@ Q_SIGNALS:
     void toggleModeChanged(bool state);
 
 protected:
-    void mousePressEvent(QMouseEvent *ev);
+    void mousePressEvent(QMouseEvent *ev) Q_DECL_OVERRIDE;
 
 private:
     void updateLabel();
diff --git a/widgets/vacationscriptindicatorwidget.h b/widgets/vacationscriptindicatorwidget.h
index 6473385cd..c99a53294 100644
--- a/widgets/vacationscriptindicatorwidget.h
+++ b/widgets/vacationscriptindicatorwidget.h
@@ -35,7 +35,7 @@ Q_SIGNALS:
     void clicked(const QString &serverName);
 
 protected:
-    void mouseReleaseEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
 
 private:
     QString mServerName;
@@ -52,7 +52,7 @@ Q_SIGNALS:
     void clicked();
 
 protected:
-    void mouseReleaseEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
 };
 
 class VacationScriptIndicatorWidget : public QWidget