diff --git a/firmware/ice40-riscv/e1-tracer/usb_e1.h b/firmware/ice40-riscv/e1-tracer/usb_e1.h
new file mode 100644
index 0000000..a573b38
--- /dev/null
+++ b/firmware/ice40-riscv/e1-tracer/usb_e1.h
@@ -0,0 +1,11 @@
+/*
+ * usb_e1.h
+ *
+ * Copyright (C) 2019-2020  Sylvain Munaut <tnt@246tNt.com>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+void usb_e1_run(void);
+void usb_e1_init(void);