diff --git a/gtk2_ardour/open_video_monitor_dialog.cc b/gtk2_ardour/open_video_monitor_dialog.cc
index 55762cc014..3d4091ff8b 100644
--- a/gtk2_ardour/open_video_monitor_dialog.cc
+++ b/gtk2_ardour/open_video_monitor_dialog.cc
@@ -167,7 +167,7 @@ OpenVideoMonitorDialog::on_show ()
 	Dialog::on_show ();
 }
 
-const int
+int
 OpenVideoMonitorDialog::xj_settings_mask ()
 {
 	int rv =0;
diff --git a/gtk2_ardour/open_video_monitor_dialog.h b/gtk2_ardour/open_video_monitor_dialog.h
index f0324a7caf..9b79352f40 100644
--- a/gtk2_ardour/open_video_monitor_dialog.h
+++ b/gtk2_ardour/open_video_monitor_dialog.h
@@ -47,7 +47,7 @@ class OpenVideoMonitorDialog : public ArdourDialog
 	~OpenVideoMonitorDialog ();
 
 	bool show_again () { return showagain_checkbox.get_active(); }
-	const int xj_settings_mask ();
+	int xj_settings_mask ();
 	void setup_settings_mask (const int);
 	void set_filename (const std::string);
 #if 1
diff --git a/gtk2_ardour/transcode_ffmpeg.cc b/gtk2_ardour/transcode_ffmpeg.cc
index 7696ecd61f..a38d9c45f0 100644
--- a/gtk2_ardour/transcode_ffmpeg.cc
+++ b/gtk2_ardour/transcode_ffmpeg.cc
@@ -475,13 +475,13 @@ TranscodeFfmpeg::ffexit ()
 }
 
 void
-TranscodeFfmpeg::ffprobeparse (std::string d, size_t s)
+TranscodeFfmpeg::ffprobeparse (std::string d, size_t /* s */)
 {
 	ffoutput+=d;
 }
 
 void
-TranscodeFfmpeg::ffmpegparse_a (std::string d, size_t s)
+TranscodeFfmpeg::ffmpegparse_a (std::string d, size_t /* s */)
 {
 	const char *t;
 	if (!(t=strstr(d.c_str(), "time="))) { return; }
@@ -491,7 +491,7 @@ TranscodeFfmpeg::ffmpegparse_a (std::string d, size_t s)
 }
 
 void
-TranscodeFfmpeg::ffmpegparse_v (std::string d, size_t s)
+TranscodeFfmpeg::ffmpegparse_v (std::string d, size_t /* s */)
 {
 	if (strstr(d.c_str(), "ERROR") || strstr(d.c_str(), "Error") || strstr(d.c_str(), "error")) {
 		PBD::warning << "ffmpeg-error: " << d << endmsg;
diff --git a/gtk2_ardour/video_monitor.h b/gtk2_ardour/video_monitor.h
index 3f391d01f6..7bb74c7e05 100644
--- a/gtk2_ardour/video_monitor.h
+++ b/gtk2_ardour/video_monitor.h
@@ -66,7 +66,7 @@ class VideoMonitor : public sigc::trackable , public ARDOUR::SessionHandlePtr, p
 	bool set_custom_setting (const std::string, const std::string);
 	const std::string get_custom_setting (const std::string);
 	void restore_settings_mask (int i)  { _restore_settings_mask = i;}
-	const int restore_settings_mask () { return _restore_settings_mask;}
+	int restore_settings_mask () const { return _restore_settings_mask;}
 
 	void set_offset (ARDOUR::frameoffset_t);
 	void manual_seek (ARDOUR::framepos_t, bool, ARDOUR::frameoffset_t);