diff --git a/libs/ardour/ardour/types.h b/libs/ardour/ardour/types.h
index 6bc1dd93ef..545991bbee 100644
--- a/libs/ardour/ardour/types.h
+++ b/libs/ardour/ardour/types.h
@@ -484,6 +484,12 @@ enum MeterLineUp {
 	MeteringLineUp15
 };
 
+enum InputMeterLayout {
+	LayoutVertical,
+	LayoutHorizontal,
+	LayoutAutomatic,
+};
+
 enum PFLPosition {
 	/** PFL signals come from before pre-fader processors */
 	PFLFromBeforeProcessors,
diff --git a/libs/ardour/ardour/types_convert.h b/libs/ardour/ardour/types_convert.h
index 9e46d51982..3e0ee20991 100644
--- a/libs/ardour/ardour/types_convert.h
+++ b/libs/ardour/ardour/types_convert.h
@@ -73,6 +73,7 @@ DEFINE_ENUM_CONVERT(ARDOUR::WaveformShape)
 DEFINE_ENUM_CONVERT(ARDOUR::ScreenSaverMode)
 DEFINE_ENUM_CONVERT(ARDOUR::VUMeterStandard)
 DEFINE_ENUM_CONVERT(ARDOUR::MeterLineUp)
+DEFINE_ENUM_CONVERT(ARDOUR::InputMeterLayout)
 DEFINE_ENUM_CONVERT(ARDOUR::MidiPortFlags)
 DEFINE_ENUM_CONVERT(ARDOUR::TransportRequestType)
 DEFINE_ENUM_CONVERT(ARDOUR::LoopFadeChoice)
diff --git a/libs/ardour/enums.cc b/libs/ardour/enums.cc
index 7adf6e5c63..2ed9535e71 100644
--- a/libs/ardour/enums.cc
+++ b/libs/ardour/enums.cc
@@ -79,6 +79,7 @@ setup_enum_writer ()
 	MeterHold _MeterHold;
 	VUMeterStandard _VUMeterStandard;
 	MeterLineUp _MeterLineUp;
+	InputMeterLayout _InputMeterLayout;
 	EditMode _EditMode;
 	RegionPoint _RegionPoint;
 	Placement _Placement;
@@ -298,6 +299,11 @@ setup_enum_writer ()
 	REGISTER_ENUM (MeteringLineUp15);
 	REGISTER (_MeterLineUp);
 
+	REGISTER_ENUM (LayoutVertical);
+	REGISTER_ENUM (LayoutHorizontal);
+	REGISTER_ENUM (LayoutAutomatic);
+	REGISTER (_InputMeterLayout);
+
 	REGISTER_ENUM (Slide);
 	REGISTER_ENUM (Splice);
 	REGISTER_ENUM (Ripple); // XXX do the old enum values have to stay in order?