diff --git a/rtengine/image16.h b/rtengine/image16.h
index 973b09504..3431d8afd 100644
--- a/rtengine/image16.h
+++ b/rtengine/image16.h
@@ -45,61 +45,62 @@ public:
     Image8* to8() const;
     Imagefloat* tofloat() const;
 
-    virtual void getStdImage(const ColorTemp &ctemp, int tran, Imagefloat* image, PreviewProps pp) const;
+    void getStdImage(const ColorTemp &ctemp, int tran, Imagefloat* image, PreviewProps pp) const override;
 
-    virtual const char* getType() const
+    const char* getType() const override
     {
         return sImage16;
     }
-    virtual int getBPS() const
+    int getBPS() const override
     {
         return 8 * sizeof(unsigned short);
     }
-    virtual void getScanline(int row, unsigned char* buffer, int bps, bool isFloat = false) const;
-    virtual void setScanline(int row, unsigned char* buffer, int bps, unsigned int numSamples);
+
+    void getScanline(int row, unsigned char* buffer, int bps, bool isFloat = false) const override;
+    void setScanline(int row, unsigned char* buffer, int bps, unsigned int numSamples) override;
 
     // functions inherited from IImage16:
-    virtual MyMutex& getMutex()
+    MyMutex& getMutex() override
     {
         return mutex();
     }
 
-    virtual cmsHPROFILE getProfile() const
+    cmsHPROFILE getProfile() const override
     {
         return getEmbeddedProfile();
     }
 
-    virtual int getBitsPerPixel() const
+    int getBitsPerPixel() const override
     {
         return 8 * sizeof(unsigned short);
     }
 
-    virtual int saveToFile(const Glib::ustring &fname) const
+    int saveToFile(const Glib::ustring &fname) const override
     {
         return save(fname);
     }
 
-    virtual int saveAsPNG(const Glib::ustring &fname, int bps = -1) const
+    saveAsPNG(const Glib::ustring &fname, int bps = -1) const override
     {
         return savePNG(fname, bps);
     }
 
-    virtual int saveAsJPEG(const Glib::ustring &fname, int quality = 100, int subSamp = 3) const
+    int saveAsJPEG(const Glib::ustring &fname, int quality = 100, int subSamp = 3) const override
     {
         return saveJPEG(fname, quality, subSamp);
     }
 
-    virtual int saveAsTIFF(const Glib::ustring &fname, int bps = -1, bool isFloat = false, bool uncompressed = false) const
+    int saveAsTIFF(const Glib::ustring &fname, int bps = -1, bool isFloat = false, bool uncompressed = false) const override
     {
         return saveTIFF(fname, bps, isFloat, uncompressed);
     }
 
-    virtual void setSaveProgressListener(ProgressListener* pl)
+    void setSaveProgressListener(ProgressListener* pl) override
     {
         setProgressListener(pl);
     }
 
-    virtual void free()
+    void free() override
     {
         delete this;
     }
diff --git a/rtengine/image8.h b/rtengine/image8.h
index 9460a4fbb..2cc670a4a 100644
--- a/rtengine/image8.h
+++ b/rtengine/image8.h
@@ -40,61 +40,63 @@ public:
 
     Image8* copy () const;
 
-    virtual void getStdImage (const ColorTemp &ctemp, int tran, Imagefloat* image, PreviewProps pp) const;
+    void getStdImage (const ColorTemp &ctemp, int tran, Imagefloat* image, PreviewProps pp) const override;
 
-    virtual const char* getType () const
+    const char* getType () const override
     {
         return sImage8;
     }
-    virtual int getBPS () const
+
+    int getBPS () const override
     {
         return 8 * sizeof(unsigned char);
     }
-    virtual void getScanline (int row, unsigned char* buffer, int bps, bool isFloat = false) const;
-    virtual void setScanline (int row, unsigned char* buffer, int bps, unsigned int numSamples);
+
+    void getScanline (int row, unsigned char* buffer, int bps, bool isFloat = false) const override;
+    void setScanline (int row, unsigned char* buffer, int bps, unsigned int numSamples) override;
 
     // functions inherited from IImage*:
-    virtual MyMutex& getMutex ()
+    MyMutex& getMutex () override
     {
         return mutex ();
     }
 
-    virtual cmsHPROFILE getProfile () const
+    cmsHPROFILE getProfile () const override
     {
         return getEmbeddedProfile ();
     }
 
-    virtual int getBitsPerPixel () const
+    int getBitsPerPixel () const override
     {
         return 8 * sizeof(unsigned char);
     }
 
-    virtual int saveToFile (const Glib::ustring &fname) const
+    int saveToFile (const Glib::ustring &fname) const override
     {
         return save (fname);
     }
 
-    virtual int saveAsPNG (const Glib::ustring &fname, int bps = -1) const
+    int saveAsPNG (const Glib::ustring &fname, int bps = -1) const override
     {
         return savePNG (fname, bps);
     }
 
-    virtual int saveAsJPEG (const Glib::ustring &fname, int quality = 100, int subSamp = 3) const
+    int saveAsJPEG (const Glib::ustring &fname, int quality = 100, int subSamp = 3) const override
     {
         return saveJPEG (fname, quality, subSamp);
     }
 
-    virtual int saveAsTIFF (const Glib::ustring &fname, int bps = -1, bool isFloat = false, bool uncompressed = false) const
+    int saveAsTIFF (const Glib::ustring &fname, int bps = -1, bool isFloat = false, bool uncompressed = false) const override
     {
         return saveTIFF (fname, bps, isFloat, uncompressed);
     }
 
-    virtual void setSaveProgressListener (ProgressListener* pl)
+    void setSaveProgressListener (ProgressListener* pl) override
     {
         setProgressListener (pl);
     }
 
-    virtual void free ()
+    void free () override
     {
         delete this;
     }
diff --git a/rtengine/imagefloat.h b/rtengine/imagefloat.h
index 49dce8284..bd7ae2a46 100644
--- a/rtengine/imagefloat.h
+++ b/rtengine/imagefloat.h
@@ -49,53 +49,55 @@ public:
     Image8* to8() const;
     Image16* to16() const;
 
-    virtual void         getStdImage (const ColorTemp &ctemp, int tran, Imagefloat* image, PreviewProps pp) const;
+    void getStdImage (const ColorTemp &ctemp, int tran, Imagefloat* image, PreviewProps pp) const override;
 
-    virtual const char* getType () const
+    const char* getType () const override
     {
         return sImagefloat;
     }
-    virtual int getBPS () const
+
+    int getBPS () const override
     {
         return 8 * sizeof(float);
     }
-    virtual void getScanline (int row, unsigned char* buffer, int bps, bool isFloat = false) const;
-    virtual void setScanline (int row, unsigned char* buffer, int bps, unsigned int numSamples);
+
+    void getScanline (int row, unsigned char* buffer, int bps, bool isFloat = false) const override;
+    void setScanline (int row, unsigned char* buffer, int bps, unsigned int numSamples) override;
 
     // functions inherited from IImagefloat:
-    virtual MyMutex& getMutex ()
+    MyMutex& getMutex () override
     {
         return mutex ();
     }
-    virtual cmsHPROFILE getProfile () const
+    cmsHPROFILE getProfile () const override
     {
         return getEmbeddedProfile ();
     }
-    virtual int getBitsPerPixel () const
+    int getBitsPerPixel () const override
     {
         return 8 * sizeof(float);
     }
-    virtual int saveToFile (const Glib::ustring &fname) const
+    int saveToFile (const Glib::ustring &fname) const override
     {
         return save (fname);
     }
-    virtual int saveAsPNG  (const Glib::ustring &fname, int bps = -1) const
+    int saveAsPNG  (const Glib::ustring &fname, int bps = -1) const override
     {
         return savePNG (fname, bps);
     }
-    virtual int saveAsJPEG (const Glib::ustring &fname, int quality = 100, int subSamp = 3) const
+    int saveAsJPEG (const Glib::ustring &fname, int quality = 100, int subSamp = 3) const override
     {
         return saveJPEG (fname, quality, subSamp);
     }
-    virtual int saveAsTIFF (const Glib::ustring &fname, int bps = -1, bool isFloat = false, bool uncompressed = false) const
+    int saveAsTIFF (const Glib::ustring &fname, int bps = -1, bool isFloat = false, bool uncompressed = false) const override
     {
         return saveTIFF (fname, bps, isFloat, uncompressed);
     }
-    virtual void setSaveProgressListener (ProgressListener* pl)
+    void setSaveProgressListener (ProgressListener* pl) override
     {
         setProgressListener (pl);
     }
-    virtual void         free ()
+    void free () override
     {
         delete this;
     }