diff --git a/libs/surfaces/mackie/controls.cc b/libs/surfaces/mackie/controls.cc
index 1ebc877ef9..9858f5fd16 100644
--- a/libs/surfaces/mackie/controls.cc
+++ b/libs/surfaces/mackie/controls.cc
@@ -115,7 +115,7 @@ Control::start_touch (double when)
 }
 	
 void
-Control::stop_touch (double when, bool mark)
+Control::stop_touch (bool mark, double when)
 {
 	if (normal_ac) {
 		return normal_ac->stop_touch (mark, when);
diff --git a/libs/surfaces/mackie/controls.h b/libs/surfaces/mackie/controls.h
index 38dad7ef7f..0923c9772f 100644
--- a/libs/surfaces/mackie/controls.h
+++ b/libs/surfaces/mackie/controls.h
@@ -73,7 +73,7 @@ public:
 	void set_value (float val);
 	
 	virtual void start_touch (double when);
-	virtual void stop_touch (double when, bool mark);
+	virtual void stop_touch (bool mark, double when);
 
   protected:
 	boost::shared_ptr<ARDOUR::AutomationControl> normal_ac;