diff --git a/gtk2_ardour/midi_region_view.h b/gtk2_ardour/midi_region_view.h
index 49759da531..1f1e9c3f2a 100644
--- a/gtk2_ardour/midi_region_view.h
+++ b/gtk2_ardour/midi_region_view.h
@@ -21,7 +21,7 @@
 
 #include <string>
 #include <vector>
-
+#include <stdint.h>
 
 #include "pbd/signals.h"
 
diff --git a/libs/evoral/evoral/ControlList.hpp b/libs/evoral/evoral/ControlList.hpp
index 0774cc528a..e66cbe2253 100644
--- a/libs/evoral/evoral/ControlList.hpp
+++ b/libs/evoral/evoral/ControlList.hpp
@@ -21,9 +21,13 @@
 
 #include <cassert>
 #include <list>
+#include <stdint.h>
+
 #include <boost/pool/pool.hpp>
 #include <boost/pool/pool_alloc.hpp>
+
 #include <glibmm/threads.h>
+
 #include "pbd/signals.h"
 
 #include "evoral/visibility.h"