diff --git a/src/zm_remote_camera.h b/src/zm_remote_camera.h
index 3c7f9f698..b4d9af3bc 100644
--- a/src/zm_remote_camera.h
+++ b/src/zm_remote_camera.h
@@ -81,10 +81,10 @@ public:
   virtual void Terminate() = 0;
   virtual int Connect() = 0;
   virtual int Disconnect() = 0;
-  virtual int PreCapture() { return 0; };
-  virtual int PrimeCapture() { return 0; };
-  virtual int Capture(ZMPacket &p) = 0;
-  virtual int PostCapture() = 0;
+  virtual int PreCapture() override { return 0; };
+  virtual int PrimeCapture() override { return 0; };
+  virtual int Capture(ZMPacket &p) override = 0;
+  virtual int PostCapture() override = 0;
   int Read(int fd, char*buf, int size);
 };
 
diff --git a/src/zm_remote_camera_http.h b/src/zm_remote_camera_http.h
index baf1dc0f4..dc793459b 100644
--- a/src/zm_remote_camera_http.h
+++ b/src/zm_remote_camera_http.h
@@ -59,19 +59,19 @@ public:
       );
   ~RemoteCameraHttp();
 
-  void Initialise();
-  void Terminate() { Disconnect(); }
-  int Connect();
-  int Disconnect();
+  void Initialise() override;
+  void Terminate() override { Disconnect(); }
+  int Connect() override;
+  int Disconnect() override;
   int SendRequest();
   int ReadData( Buffer &buffer, unsigned int bytes_expected=0 );
 	int GetData();
   int GetResponse();
-  int PrimeCapture();
-  int PreCapture();
-  int Capture( ZMPacket &p );
-  int PostCapture();
-  int Close() { Disconnect(); return 0; };
+  int PrimeCapture() override;
+  int PreCapture() override;
+  int Capture( ZMPacket &p ) override;
+  int PostCapture() override;
+  int Close() override { Disconnect(); return 0; };
 };
 
 #endif // ZM_REMOTE_CAMERA_HTTP_H
diff --git a/src/zm_remote_camera_nvsocket.h b/src/zm_remote_camera_nvsocket.h
index 5d021a8ff..1cd740af2 100644
--- a/src/zm_remote_camera_nvsocket.h
+++ b/src/zm_remote_camera_nvsocket.h
@@ -47,16 +47,16 @@ public:
       bool p_record_audio );
   ~RemoteCameraNVSocket();
 
-  void Initialise();
-  void Terminate() { Disconnect(); }
-  int Connect();
-  int Disconnect();
+  void Initialise() override;
+  void Terminate() override { Disconnect(); }
+  int Connect() override;
+  int Disconnect() override;
   int SendRequest(std::string);
   int GetResponse();
-  int PrimeCapture();
-  int Capture(ZMPacket &p);
-  int PostCapture();
-  int Close() { return 0; };
+  int PrimeCapture() override;
+  int Capture(ZMPacket &p) override;
+  int PostCapture() override;
+  int Close() override { return 0; };
 };
 
 #endif // ZM_REMOTE_CAMERA_NVSOCKET_H