diff --git a/src/audio.cpp b/src/audio.cpp
index c1b171b..793c447 100644
--- a/src/audio.cpp
+++ b/src/audio.cpp
@@ -24,7 +24,10 @@
 #include "audiostream.h"
 #include "soundemitter.h"
 #include "sharedstate.h"
+
+#ifdef MIDI
 #include "sharedmidistate.h"
+#endif
 
 #include <string>