diff --git a/src/devices/cddadevice.h b/src/devices/cddadevice.h
index 9cec29d70..bb55e9ffb 100644
--- a/src/devices/cddadevice.h
+++ b/src/devices/cddadevice.h
@@ -44,8 +44,8 @@ class CddaDevice : public ConnectedDevice {
   ~CddaDevice();
 
   bool Init() override;
-  bool CopyToStorage(const MusicStorage::CopyJob&) { return false; }
-  bool DeleteFromStorage(const MusicStorage::DeleteJob&) { return false; }
+  bool CopyToStorage(const MusicStorage::CopyJob&) override { return false; }
+  bool DeleteFromStorage(const MusicStorage::DeleteJob&) override { return false; }
   CddaSongLoader* loader();
   // Access to the raw cdio device handle.
   CdIo_t* raw_cdio();  // TODO: not ideal, but Ripper needs this currently
diff --git a/src/devices/gpoddevice.h b/src/devices/gpoddevice.h
index b08467ec7..cce90790b 100644
--- a/src/devices/gpoddevice.h
+++ b/src/devices/gpoddevice.h
@@ -41,15 +41,15 @@ class GPodDevice : public ConnectedDevice, public virtual MusicStorage {
 
   static QStringList url_schemes() { return QStringList() << "ipod"; }
 
-  bool GetSupportedFiletypes(QList<Song::FileType>* ret);
+  bool GetSupportedFiletypes(QList<Song::FileType>* ret) override;
 
-  bool StartCopy(QList<Song::FileType>* supported_types);
-  bool CopyToStorage(const CopyJob& job);
-  void FinishCopy(bool success);
+  bool StartCopy(QList<Song::FileType>* supported_types) override;
+  bool CopyToStorage(const CopyJob& job) override;
+  void FinishCopy(bool success) override;
 
-  void StartDelete();
-  bool DeleteFromStorage(const DeleteJob& job);
-  void FinishDelete(bool success);
+  void StartDelete() override;
+  bool DeleteFromStorage(const DeleteJob& job) override;
+  void FinishDelete(bool success) override;
 
  protected slots:
   void LoadFinished(Itdb_iTunesDB* db);
diff --git a/src/devices/mtpdevice.h b/src/devices/mtpdevice.h
index 1cf481794..06114cde9 100644
--- a/src/devices/mtpdevice.h
+++ b/src/devices/mtpdevice.h
@@ -44,19 +44,19 @@ class MtpDevice : public ConnectedDevice {
   }
 
   bool Init() override;
-  void ConnectAsync();
+  void ConnectAsync() override;
 
-  bool GetSupportedFiletypes(QList<Song::FileType>* ret);
+  bool GetSupportedFiletypes(QList<Song::FileType>* ret) override;
   int GetFreeSpace();
   int GetCapacity();
 
-  bool StartCopy(QList<Song::FileType>* supported_types);
-  bool CopyToStorage(const CopyJob& job);
-  void FinishCopy(bool success);
+  bool StartCopy(QList<Song::FileType>* supported_types) override;
+  bool CopyToStorage(const CopyJob& job) override;
+  void FinishCopy(bool success) override;
 
-  void StartDelete();
-  bool DeleteFromStorage(const DeleteJob& job);
-  void FinishDelete(bool success);
+  void StartDelete() override;
+  bool DeleteFromStorage(const DeleteJob& job) override;
+  void FinishDelete(bool success) override;
 
  private slots:
   void LoadFinished(bool success);
diff --git a/src/internet/core/cloudfileservice.h b/src/internet/core/cloudfileservice.h
index 3363d6d3e..bf2d508e7 100644
--- a/src/internet/core/cloudfileservice.h
+++ b/src/internet/core/cloudfileservice.h
@@ -43,8 +43,8 @@ class CloudFileService : public InternetService {
                    const QIcon& icon, SettingsDialog::Page settings_page);
 
   // InternetService
-  virtual QStandardItem* CreateRootItem();
-  virtual void LazyPopulate(QStandardItem* item);
+  virtual QStandardItem* CreateRootItem() override;
+  virtual void LazyPopulate(QStandardItem* item) override;
 
   virtual bool has_credentials() const = 0;
   bool is_indexing() const { return indexing_task_id_ != -1; }
diff --git a/src/internet/googledrive/googledriveservice.h b/src/internet/googledrive/googledriveservice.h
index c229947b0..0b9058cab 100644
--- a/src/internet/googledrive/googledriveservice.h
+++ b/src/internet/googledrive/googledriveservice.h
@@ -39,7 +39,7 @@ class GoogleDriveService : public CloudFileService {
   static const char* kServiceName;
   static const char* kSettingsGroup;
 
-  virtual bool has_credentials() const;
+  virtual bool has_credentials() const override;
 
   google_drive::Client* client() const { return client_; }
   QString refresh_token() const;
@@ -47,7 +47,7 @@ class GoogleDriveService : public CloudFileService {
   QUrl GetStreamingUrlFromSongId(const QString& file_id);
 
  public slots:
-  void Connect();
+  void Connect() override;
   void ForgetCredentials();
 
  signals:
diff --git a/src/internet/skydrive/skydriveservice.h b/src/internet/skydrive/skydriveservice.h
index 37a531057..8b1436c2f 100644
--- a/src/internet/skydrive/skydriveservice.h
+++ b/src/internet/skydrive/skydriveservice.h
@@ -37,13 +37,13 @@ class SkydriveService : public CloudFileService {
   static const char* kServiceName;
   static const char* kSettingsGroup;
 
-  virtual bool has_credentials() const;
+  virtual bool has_credentials() const override;
   QUrl GetStreamingUrlFromSongId(const QString& song_id);
 
   QString GetScheme() const { return "onedrive"; }
 
  public slots:
-  virtual void Connect();
+  virtual void Connect() override;
   void ForgetCredentials();
 
  private slots: