4 files changed, 5 insertions, 0 deletions
diff --git a/libs/ardour/ardour/midi_region.h b/libs/ardour/ardour/midi_region.h
index e6357746f7..9039db63d5 100644
--- a/libs/ardour/ardour/midi_region.h
+++ b/libs/ardour/ardour/midi_region.h
@@ -26,6 +26,8 @@
 #include "evoral/Beats.hpp"
 #include "evoral/Range.hpp"
 
+#include "pbd/string_convert.h"
+
 #include "ardour/ardour.h"
 #include "ardour/midi_cursor.h"
 #include "ardour/region.h"
diff --git a/libs/ardour/midi_diskstream.cc b/libs/ardour/midi_diskstream.cc
index ce9a3d55ea..cfcfc1c8da 100644
--- a/libs/ardour/midi_diskstream.cc
+++ b/libs/ardour/midi_diskstream.cc
@@ -40,6 +40,7 @@
 #include "ardour/audioengine.h"
 #include "ardour/butler.h"
 #include "ardour/debug.h"
+#include "ardour/evoral_types_convert.h"
 #include "ardour/io.h"
 #include "ardour/midi_diskstream.h"
 #include "ardour/midi_model.h"
diff --git a/libs/ardour/midi_region.cc b/libs/ardour/midi_region.cc
index 84b1f5c716..dc7293f7b5 100644
--- a/libs/ardour/midi_region.cc
+++ b/libs/ardour/midi_region.cc
@@ -44,6 +44,7 @@
 #include "ardour/source_factory.h"
 #include "ardour/tempo.h"
 #include "ardour/types.h"
+#include "ardour/evoral_types_convert.h"
 
 #include "pbd/i18n.h"
 #include <locale.h>
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index 86e52b8e7c..3da26cf690 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -37,6 +37,7 @@
 #include "ardour/source.h"
 #include "ardour/tempo.h"
 #include "ardour/transient_detector.h"
+#include "ardour/types_convert.h"
 
 #include "pbd/i18n.h"