1 files changed, 1 insertions, 8 deletions
diff --git a/audio/mididrv.h b/audio/mididrv.h
index 92fbb09fa3..c6c5179051 100644
--- a/audio/mididrv.h
+++ b/audio/mididrv.h
@@ -27,17 +27,10 @@
 #define SOUND_MIDIDRV_H
 
 #include "common/scummsys.h"
+#include "common/str.h"
 #include "common/timer.h"
 
 class MidiChannel;
-class MusicDevice;
-
-namespace Audio {
-class Mixer;
-}
-namespace Common {
-class String;
-}
 
 /**
  * Music types that music drivers can implement and engines can rely on.