diff --git a/firmware/ice40-riscv/e1-tracer/fw_app.c b/firmware/ice40-riscv/e1-tracer/fw_app.c
index c764b2e..3ddbf50 100644
--- a/firmware/ice40-riscv/e1-tracer/fw_app.c
+++ b/firmware/ice40-riscv/e1-tracer/fw_app.c
@@ -18,15 +18,12 @@
 #include "misc.h"
 #include "mini-printf.h"
 #include "spi.h"
+#include "usb_e1.h"
 #include "utils.h"
 
 
 extern const struct usb_stack_descriptors app_stack_desc;
 
-void usb_e1_init(void);
-void usb_e1_run(void);
-
-
 static void
 serial_no_init()
 {