diff --git a/src/engine/platform/sound/namco.h b/src/engine/platform/sound/namco.h
index 27e2b8876..9a42876d9 100644
--- a/src/engine/platform/sound/namco.h
+++ b/src/engine/platform/sound/namco.h
@@ -3,6 +3,7 @@
 #ifndef MAME_SOUND_NAMCO_H
 #define MAME_SOUND_NAMCO_H
 
+#include <stdio.h>
 #include <stdint.h>
 #include <memory>