diff --git a/libs/ardour/ardour/vst3_plugin.h b/libs/ardour/ardour/vst3_plugin.h
index 6482ff04e3..fcfa602d4a 100644
--- a/libs/ardour/ardour/vst3_plugin.h
+++ b/libs/ardour/ardour/vst3_plugin.h
@@ -173,7 +173,9 @@ public:
 	                       EndGesture,
 	                       ValueChange,
 	                       InternalChange,
-	                       PresetChange };
+	                       PresetChange,
+	                       ParamValueChanged
+	                     };
 
 	PBD::Signal3<void, ParameterChange, uint32_t, float> OnParameterChange;
 
diff --git a/libs/ardour/vst3_plugin.cc b/libs/ardour/vst3_plugin.cc
index 04027db66f..7226d27166 100644
--- a/libs/ardour/vst3_plugin.cc
+++ b/libs/ardour/vst3_plugin.cc
@@ -124,6 +124,8 @@ VST3Plugin::parameter_change_handler (VST3PI::ParameterChange t, uint32_t param,
 			break;
 		case VST3PI::ValueChange:
 			_parameter_queue.write_one (PV (param, value));
+			/* fallthrough */
+		case VST3PI::ParamValueChanged:
 			/* emit ParameterChangedExternally, mark preset dirty */
 			Plugin::parameter_changed_externally (param, value);
 			break;
@@ -1943,6 +1945,7 @@ VST3PI::update_shadow_data ()
 			_input_param_changes.addParameterData (i->second, index)->addPoint (0, v, index);
 #endif
 			_shadow_data[i->first] = v;
+			OnParameterChange (ParamValueChanged, i->first, v); /* EMIT SIGNAL */
 		}
 	}
 }