diff --git a/firmware/mpeg.h b/firmware/mpeg.h
index 2e23f13ea1..baf6b7b476 100644
--- a/firmware/mpeg.h
+++ b/firmware/mpeg.h
@@ -19,6 +19,8 @@
 #ifndef _MPEG_H_
 #define _MPEG_H_
 
+#include <stdbool.h>
+
 void mpeg_init(int volume, int bass, int treble);
 void mpeg_play(char* trackname);
 void mpeg_stop(void);