diff --git a/plugins/MidiImport/portsmf/allegro.h b/plugins/MidiImport/portsmf/allegro.h
index ca5859aef..6210652e2 100644
--- a/plugins/MidiImport/portsmf/allegro.h
+++ b/plugins/MidiImport/portsmf/allegro.h
@@ -49,6 +49,7 @@
 #ifndef ALLEGRO_H
 #define ALLEGRO_H
 #include <assert.h>
+#include <cstdint>
 #include <cstring>
 #include <istream>
 #include <ostream>