diff --git a/lib/audiodev/AQS.cpp b/lib/audiodev/AQS.cpp
index 80f4ba0..c187cd4 100644
--- a/lib/audiodev/AQS.cpp
+++ b/lib/audiodev/AQS.cpp
@@ -140,7 +140,7 @@ struct AQSAudioVoiceEngine : BaseAudioVoiceEngine {
   /*
    * https://stackoverflow.com/questions/1983984/how-to-get-audio-device-uid-to-pass-into-nssounds-setplaybackdeviceidentifier
    */
-  std::vector<std::pair<std::string, std::string>> enumerateAudioOutputs() const {
+  std::vector<std::pair<std::string, std::string>> enumerateAudioOutputs() const override {
     std::vector<std::pair<std::string, std::string>> ret;
 
     AudioObjectPropertyAddress propertyAddress;
@@ -209,7 +209,7 @@ struct AQSAudioVoiceEngine : BaseAudioVoiceEngine {
     return ret;
   }
 
-  std::vector<std::pair<std::string, std::string>> enumerateMIDIInputs() const {
+  std::vector<std::pair<std::string, std::string>> enumerateMIDIInputs() const override {
     if (!m_midiClient)
       return {};
 
@@ -255,7 +255,7 @@ struct AQSAudioVoiceEngine : BaseAudioVoiceEngine {
     return ret;
   }
 
-  bool supportsVirtualMIDIIn() const { return true; }
+  bool supportsVirtualMIDIIn() const override { return true; }
 
   static MIDIDeviceRef LookupMIDIDevice(const char* name) {
     ItemCount numDevices = MIDIGetNumberOfDevices();
diff --git a/lib/mac/ApplicationCocoa.mm b/lib/mac/ApplicationCocoa.mm
index 577d95a..8914d2d 100644
--- a/lib/mac/ApplicationCocoa.mm
+++ b/lib/mac/ApplicationCocoa.mm
@@ -52,7 +52,7 @@ private:
   GLContext m_glCtx;
 #endif
 
-  void _deletedWindow(IWindow* window) {
+  void _deletedWindow(IWindow* window) override {
     m_windows.erase(window->getPlatformHandle());
   }