diff --git a/libs/ardour/plugin.cc b/libs/ardour/plugin.cc
index b0d809b1c3..726337136a 100644
--- a/libs/ardour/plugin.cc
+++ b/libs/ardour/plugin.cc
@@ -112,6 +112,7 @@ Plugin::Plugin (const Plugin& other)
 	, _for_impulse_analysis (false)
 	, _have_presets (false)
 	, _have_pending_stop_events (false)
+	, _last_preset (other._last_preset)
 	, _parameter_changed_since_last_preset (false)
 	, _immediate_events(6096) // FIXME: size?
 {
diff --git a/libs/ardour/plugin_insert.cc b/libs/ardour/plugin_insert.cc
index f7712f8add..e1554cc8f1 100644
--- a/libs/ardour/plugin_insert.cc
+++ b/libs/ardour/plugin_insert.cc
@@ -574,6 +574,10 @@ PluginInsert::parameter_changed_externally (uint32_t which, float val)
 			(*i)->set_parameter (which, val);
 		}
 	}
+	boost::shared_ptr<Plugin> iasp = _impulseAnalysisPlugin.lock();
+	if (iasp) {
+		iasp->set_parameter (which, val);
+	}
 }
 
 int
@@ -3171,6 +3175,12 @@ PluginInsert::load_preset (ARDOUR::Plugin::PresetRecord pr)
 			ok = false;
 		}
 	}
+
+	boost::shared_ptr<Plugin> iasp = _impulseAnalysisPlugin.lock();
+	if (iasp) {
+		iasp->load_preset (pr);
+	}
+
 	return ok;
 }