diff --git a/src/plugins/coreplugin/locator/basefilefilter.h b/src/plugins/coreplugin/locator/basefilefilter.h
index 16cfc45c71b..c4623a25dcb 100644
--- a/src/plugins/coreplugin/locator/basefilefilter.h
+++ b/src/plugins/coreplugin/locator/basefilefilter.h
@@ -69,9 +69,10 @@ public:
 
     BaseFileFilter();
     ~BaseFileFilter();
-    void prepareSearch(const QString &entry);
-    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future, const QString &entry);
-    void accept(LocatorFilterEntry selection) const;
+    void prepareSearch(const QString &entry) override;
+    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future,
+                                         const QString &entry) override;
+    void accept(LocatorFilterEntry selection) const override;
 
 protected:
     void setFileIterator(Iterator *iterator);
diff --git a/src/plugins/coreplugin/locator/commandlocator.h b/src/plugins/coreplugin/locator/commandlocator.h
index f9704fa43b4..1ce2eb0226e 100644
--- a/src/plugins/coreplugin/locator/commandlocator.h
+++ b/src/plugins/coreplugin/locator/commandlocator.h
@@ -45,9 +45,10 @@ public:
 
     void appendCommand(Command *cmd);
 
-    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future, const QString &entry);
-    void accept(LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future,
+                                         const QString &entry) override;
+    void accept(LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     CommandLocatorPrivate *d;
diff --git a/src/plugins/coreplugin/locator/directoryfilter.h b/src/plugins/coreplugin/locator/directoryfilter.h
index 8441b9d6c3d..06ef1f37e3c 100644
--- a/src/plugins/coreplugin/locator/directoryfilter.h
+++ b/src/plugins/coreplugin/locator/directoryfilter.h
@@ -42,10 +42,10 @@ class DirectoryFilter : public BaseFileFilter
 
 public:
     DirectoryFilter(Id id);
-    QByteArray saveState() const;
-    void restoreState(const QByteArray &state);
-    bool openConfigDialog(QWidget *parent, bool &needsRefresh);
-    void refresh(QFutureInterface<void> &future);
+    QByteArray saveState() const override;
+    void restoreState(const QByteArray &state) override;
+    bool openConfigDialog(QWidget *parent, bool &needsRefresh) override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     void addDirectory();
diff --git a/src/plugins/coreplugin/locator/executefilter.h b/src/plugins/coreplugin/locator/executefilter.h
index 890468354e8..32d8f78705b 100644
--- a/src/plugins/coreplugin/locator/executefilter.h
+++ b/src/plugins/coreplugin/locator/executefilter.h
@@ -50,9 +50,9 @@ class ExecuteFilter : public Core::ILocatorFilter
 public:
     ExecuteFilter();
     QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future,
-                                         const QString &entry);
-    void accept(LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &) {}
+                                         const QString &entry) override;
+    void accept(LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &) override {}
 
 private:
     void finished(int exitCode, QProcess::ExitStatus status);
diff --git a/src/plugins/coreplugin/locator/filesystemfilter.h b/src/plugins/coreplugin/locator/filesystemfilter.h
index 0dd2e003a2c..63384e2cd91 100644
--- a/src/plugins/coreplugin/locator/filesystemfilter.h
+++ b/src/plugins/coreplugin/locator/filesystemfilter.h
@@ -44,13 +44,14 @@ class FileSystemFilter : public ILocatorFilter
 
 public:
     explicit FileSystemFilter(LocatorWidget *locatorWidget);
-    void prepareSearch(const QString &entry);
-    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future, const QString &entry);
-    void accept(LocatorFilterEntry selection) const;
-    QByteArray saveState() const;
-    void restoreState(const QByteArray &state);
-    bool openConfigDialog(QWidget *parent, bool &needsRefresh);
-    void refresh(QFutureInterface<void> &) {}
+    void prepareSearch(const QString &entry) override;
+    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future,
+                                         const QString &entry) override;
+    void accept(LocatorFilterEntry selection) const override;
+    QByteArray saveState() const override;
+    void restoreState(const QByteArray &state) override;
+    bool openConfigDialog(QWidget *parent, bool &needsRefresh) override;
+    void refresh(QFutureInterface<void> &) override {}
 
 private:
     LocatorWidget *m_locatorWidget;
diff --git a/src/plugins/coreplugin/locator/locator_test.cpp b/src/plugins/coreplugin/locator/locator_test.cpp
index 021732d2138..5b4653c5fe9 100644
--- a/src/plugins/coreplugin/locator/locator_test.cpp
+++ b/src/plugins/coreplugin/locator/locator_test.cpp
@@ -49,7 +49,7 @@ public:
         setFileIterator(new BaseFileFilter::ListIterator(theFiles));
     }
 
-    void refresh(QFutureInterface<void> &) {}
+    void refresh(QFutureInterface<void> &) override {}
 };
 
 inline QString _(const QByteArray &ba) { return QString::fromLatin1(ba, ba.size()); }
diff --git a/src/plugins/coreplugin/locator/locatorfiltersfilter.h b/src/plugins/coreplugin/locator/locatorfiltersfilter.h
index b0e8a1ba0ae..a97cc9493af 100644
--- a/src/plugins/coreplugin/locator/locatorfiltersfilter.h
+++ b/src/plugins/coreplugin/locator/locatorfiltersfilter.h
@@ -48,10 +48,11 @@ public:
                          LocatorWidget *locatorWidget);
 
     // ILocatorFilter
-    void prepareSearch(const QString &entry);
-    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future, const QString &entry);
-    void accept(LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+    void prepareSearch(const QString &entry) override;
+    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future,
+                                         const QString &entry) override;
+    void accept(LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     Locator *m_plugin;
diff --git a/src/plugins/coreplugin/locator/opendocumentsfilter.h b/src/plugins/coreplugin/locator/opendocumentsfilter.h
index d676618331e..00622d1dbfd 100644
--- a/src/plugins/coreplugin/locator/opendocumentsfilter.h
+++ b/src/plugins/coreplugin/locator/opendocumentsfilter.h
@@ -43,9 +43,10 @@ class OpenDocumentsFilter : public ILocatorFilter
 
 public:
     OpenDocumentsFilter();
-    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future, const QString &entry);
-    void accept(LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+    QList<LocatorFilterEntry> matchesFor(QFutureInterface<LocatorFilterEntry> &future,
+                                         const QString &entry) override;
+    void accept(LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 public slots:
     void refreshInternally();
diff --git a/src/plugins/coreplugin/locator/spotlightlocatorfilter.h b/src/plugins/coreplugin/locator/spotlightlocatorfilter.h
index a3a0fcafebe..45dc33900d1 100644
--- a/src/plugins/coreplugin/locator/spotlightlocatorfilter.h
+++ b/src/plugins/coreplugin/locator/spotlightlocatorfilter.h
@@ -42,8 +42,8 @@ public:
         setShortcutString(QLatin1String("md"));
     }
 
-    void prepareSearch(const QString &entry);
-    void refresh(QFutureInterface<void> &future);
+    void prepareSearch(const QString &entry) override;
+    void refresh(QFutureInterface<void> &future) override;
 };
 
 } // Internal
diff --git a/src/plugins/cpptools/cppcurrentdocumentfilter.h b/src/plugins/cpptools/cppcurrentdocumentfilter.h
index 53122e1fffb..2a93cd3432e 100644
--- a/src/plugins/cpptools/cppcurrentdocumentfilter.h
+++ b/src/plugins/cpptools/cppcurrentdocumentfilter.h
@@ -46,9 +46,10 @@ public:
                                       StringTable &stringTable);
     ~CppCurrentDocumentFilter() {}
 
-    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future, const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     void onDocumentUpdated(CPlusPlus::Document::Ptr doc);
diff --git a/src/plugins/cpptools/cppincludesfilter.h b/src/plugins/cpptools/cppincludesfilter.h
index bfc30c927c0..d6304ee8043 100644
--- a/src/plugins/cpptools/cppincludesfilter.h
+++ b/src/plugins/cpptools/cppincludesfilter.h
@@ -39,8 +39,8 @@ public:
 
     // ILocatorFilter interface
 public:
-    void prepareSearch(const QString &entry);
-    void refresh(QFutureInterface<void> &future);
+    void prepareSearch(const QString &entry) override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     void markOutdated();
diff --git a/src/plugins/cpptools/cpplocatorfilter.h b/src/plugins/cpptools/cpplocatorfilter.h
index 90716a52865..84ab9802ba6 100644
--- a/src/plugins/cpptools/cpplocatorfilter.h
+++ b/src/plugins/cpptools/cpplocatorfilter.h
@@ -42,9 +42,9 @@ public:
     ~CppLocatorFilter();
 
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
-                                               const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 protected:
     virtual IndexItem::ItemType matchTypes() const { return IndexItem::All; }
diff --git a/src/plugins/help/helpindexfilter.h b/src/plugins/help/helpindexfilter.h
index f0edb547f64..701c37dbd39 100644
--- a/src/plugins/help/helpindexfilter.h
+++ b/src/plugins/help/helpindexfilter.h
@@ -42,11 +42,11 @@ public:
     ~HelpIndexFilter();
 
     // ILocatorFilter
-    void prepareSearch(const QString &entry);
+    void prepareSearch(const QString &entry) override;
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
-                                               const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
     Q_INVOKABLE QSet<QString> searchMatches(const QString &databaseFilePath,
                                           const QString &term, int limit);
diff --git a/src/plugins/help/remotehelpfilter.h b/src/plugins/help/remotehelpfilter.h
index e166ad6ecfa..1dc89ab0856 100644
--- a/src/plugins/help/remotehelpfilter.h
+++ b/src/plugins/help/remotehelpfilter.h
@@ -43,12 +43,13 @@ public:
     ~RemoteHelpFilter();
 
     // ILocatorFilter
-    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future, const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
-    QByteArray saveState() const;
-    void restoreState(const QByteArray &state);
-    bool openConfigDialog(QWidget *parent, bool &needsRefresh);
+    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
+    QByteArray saveState() const override;
+    void restoreState(const QByteArray &state) override;
+    bool openConfigDialog(QWidget *parent, bool &needsRefresh) override;
 
     QStringList remoteUrls() const;
 
diff --git a/src/plugins/macros/macrolocatorfilter.h b/src/plugins/macros/macrolocatorfilter.h
index a20b296ce61..442de6d3e24 100644
--- a/src/plugins/macros/macrolocatorfilter.h
+++ b/src/plugins/macros/macrolocatorfilter.h
@@ -43,9 +43,10 @@ public:
     MacroLocatorFilter();
     ~MacroLocatorFilter();
 
-    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future, const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     const QIcon m_icon;
diff --git a/src/plugins/qmljstools/qmljsfunctionfilter.h b/src/plugins/qmljstools/qmljsfunctionfilter.h
index 503343ea4a4..d696744694c 100644
--- a/src/plugins/qmljstools/qmljsfunctionfilter.h
+++ b/src/plugins/qmljstools/qmljsfunctionfilter.h
@@ -40,9 +40,10 @@ public:
     explicit FunctionFilter(LocatorData *data, QObject *parent = 0);
     ~FunctionFilter();
 
-    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future, const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &future);
+    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &future) override;
 
 private:
     LocatorData *m_data;
diff --git a/src/plugins/texteditor/linenumberfilter.h b/src/plugins/texteditor/linenumberfilter.h
index 8a8954cadf2..8d0fe999ede 100644
--- a/src/plugins/texteditor/linenumberfilter.h
+++ b/src/plugins/texteditor/linenumberfilter.h
@@ -43,10 +43,11 @@ class LineNumberFilter : public Core::ILocatorFilter
 public:
     explicit LineNumberFilter(QObject *parent = 0);
 
-    void prepareSearch(const QString &entry);
-    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future, const QString &entry);
-    void accept(Core::LocatorFilterEntry selection) const;
-    void refresh(QFutureInterface<void> &) {}
+    void prepareSearch(const QString &entry) override;
+    QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
+                                               const QString &entry) override;
+    void accept(Core::LocatorFilterEntry selection) const override;
+    void refresh(QFutureInterface<void> &) override {}
 
 private:
     bool m_hasCurrentEditor;