diff --git a/sound/usb/format.c b/sound/usb/format.c
index 5b792d2c8061..95d5d7c4f957 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -30,6 +30,7 @@
 #include "helper.h"
 #include "debug.h"
 #include "clock.h"
+#include "format.h"
 
 /*
  * parse the audio format type I descriptor