diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index 1b0c82975c..343ddf99b6 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -268,6 +268,8 @@ MixerStrip::init ()
 	trim_control.set_tooltip_prefix (_("Trim: "));
 	trim_control.set_name ("trim knob");
 	trim_control.set_no_show_all (true);
+	trim_control.StartGesture.connect(sigc::mem_fun(*this, &MixerStrip::trim_start_touch));
+	trim_control.StopGesture.connect(sigc::mem_fun(*this, &MixerStrip::trim_end_touch));
 	input_button_box.pack_start (trim_control, false, false);
 
 	global_vpacker.set_border_width (1);
@@ -497,6 +499,24 @@ MixerStrip::update_trim_control ()
 	}
 }
 
+void
+MixerStrip::trim_start_touch ()
+{
+	assert (_route && _session);
+	if (route()->trim() && route()->trim()->active() && route()->n_inputs().n_audio() > 0) {
+		route()->trim()->gain_control ()->start_touch (_session->transport_frame());
+	}
+}
+
+void
+MixerStrip::trim_end_touch ()
+{
+	assert (_route && _session);
+	if (route()->trim() && route()->trim()->active() && route()->n_inputs().n_audio() > 0) {
+		route()->trim()->gain_control ()->stop_touch (_session->transport_frame());
+	}
+}
+
 void
 MixerStrip::set_route (boost::shared_ptr<Route> rt)
 {
diff --git a/gtk2_ardour/mixer_strip.h b/gtk2_ardour/mixer_strip.h
index 531c0daf5c..d9979d0989 100644
--- a/gtk2_ardour/mixer_strip.h
+++ b/gtk2_ardour/mixer_strip.h
@@ -216,6 +216,9 @@ private:
 	ArdourWidgets::ArdourButton _comment_button;
 	ArdourWidgets::ArdourKnob   trim_control;
 
+	void trim_start_touch ();
+	void trim_end_touch ();
+
 	void setup_comment_button ();
 
 	ArdourWidgets::ArdourButton group_button;