diff --git a/src/main.c b/src/main.c
index b3d6689..19270a0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -71,7 +71,7 @@ void usb_teardown(void);
 
 #else
 
-#define usb_init()
+#define usb_init(x)
 #define usb_teardown()
 
 #endif