diff --git a/firmware/usb.c b/firmware/usb.c
index 268cab6d4c..763dd53e99 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -27,6 +27,7 @@
 #include "disk.h"
 #include "panic.h"
 #include "lcd.h"
+#include "adc.h"
 
 
 #define USB_REALLY_BRAVE