diff --git a/libs/ardour/ardour/amp.h b/libs/ardour/ardour/amp.h
index e8e353bdfa..e276336436 100644
--- a/libs/ardour/ardour/amp.h
+++ b/libs/ardour/ardour/amp.h
@@ -72,7 +72,6 @@ public:
 	}
 
 private:
-	bool   _denormal_protection;
 	bool   _apply_gain_automation;
 	float  _current_gain;
 	samplepos_t _current_automation_sample;
diff --git a/libs/ardour/ardour/export_channel.h b/libs/ardour/ardour/export_channel.h
index aa504eb8da..14b6533803 100644
--- a/libs/ardour/ardour/export_channel.h
+++ b/libs/ardour/ardour/export_channel.h
@@ -119,7 +119,6 @@ class LIBARDOUR_API RegionExportChannelFactory
 	void update_buffers (samplecnt_t samples);
 
 	AudioRegion const & region;
-	AudioTrack & track;
 	Type type;
 
 	samplecnt_t samples_per_cycle;
diff --git a/libs/ardour/ardour/solo_isolate_control.h b/libs/ardour/ardour/solo_isolate_control.h
index d869bed603..54be3e4a6f 100644
--- a/libs/ardour/ardour/solo_isolate_control.h
+++ b/libs/ardour/ardour/solo_isolate_control.h
@@ -37,7 +37,7 @@ class Muteable;
 class LIBARDOUR_API SoloIsolateControl : public SlavableAutomationControl
 {
   public:
-	SoloIsolateControl (Session& session, std::string const & name, Soloable& soloable, Muteable& m);
+	SoloIsolateControl (Session& session, std::string const & name, Soloable& soloable);
 
 	double get_value () const;
 
@@ -78,7 +78,6 @@ class LIBARDOUR_API SoloIsolateControl : public SlavableAutomationControl
 
   private:
 	Soloable&      _soloable;
-	Muteable&      _muteable;
 	bool           _solo_isolated;
 	uint32_t       _solo_isolated_by_upstream;
 
diff --git a/libs/ardour/export_channel.cc b/libs/ardour/export_channel.cc
index 6ee3978533..a6fb193324 100644
--- a/libs/ardour/export_channel.cc
+++ b/libs/ardour/export_channel.cc
@@ -169,9 +169,8 @@ PortExportChannel::set_state (XMLNode * node, Session & session)
 	}
 }
 
-RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type)
+RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack&, Type type)
 	: region (region)
-	, track (track)
 	, type (type)
 	, samples_per_cycle (session->engine().samples_per_cycle ())
 	, buffers_up_to_date (false)
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 987794287e..0ee56879ab 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -173,7 +173,7 @@ Route::init ()
 	_phase_control.reset (new PhaseControl (_session, X_("phase")));
 	add_control (_phase_control);
 
-	_solo_isolate_control.reset (new SoloIsolateControl (_session, X_("solo-iso"), *this, *this));
+	_solo_isolate_control.reset (new SoloIsolateControl (_session, X_("solo-iso"), *this));
 	add_control (_solo_isolate_control);
 
 	_solo_safe_control.reset (new SoloSafeControl (_session, X_("solo-safe")));
diff --git a/libs/ardour/solo_isolate_control.cc b/libs/ardour/solo_isolate_control.cc
index 34ce067fd7..16f764cd86 100644
--- a/libs/ardour/solo_isolate_control.cc
+++ b/libs/ardour/solo_isolate_control.cc
@@ -28,12 +28,11 @@ using namespace ARDOUR;
 using namespace std;
 using namespace PBD;
 
-SoloIsolateControl::SoloIsolateControl (Session& session, std::string const & name, Soloable& s, Muteable& m)
+SoloIsolateControl::SoloIsolateControl (Session& session, std::string const & name, Soloable& s)
 	: SlavableAutomationControl (session, SoloIsolateAutomation, ParameterDescriptor (SoloIsolateAutomation),
 	                             boost::shared_ptr<AutomationList>(new AutomationList(Evoral::Parameter(SoloIsolateAutomation))),
 	                             name)
 	, _soloable (s)
-	, _muteable (m)
 	, _solo_isolated (false)
 	, _solo_isolated_by_upstream (0)
 {