diff --git a/firmware/ice40-riscv/e1-tracer/usb_e1.c b/firmware/ice40-riscv/e1-tracer/usb_e1.c
index 421305b..3c577a4 100644
--- a/firmware/ice40-riscv/e1-tracer/usb_e1.c
+++ b/firmware/ice40-riscv/e1-tracer/usb_e1.c
@@ -28,9 +28,6 @@ unsigned int e1_rx_level(int chan);
 uint8_t e1_get_pending_flags(int chan);
 /* ---- */
 
-bool
-usb_ep_boot(const struct usb_intf_desc *intf, uint8_t ep_addr, bool dual_bd);
-
 
 void
 usb_e1_run(void)
diff --git a/firmware/ice40-riscv/icE1usb/usb_e1.c b/firmware/ice40-riscv/icE1usb/usb_e1.c
index 11402c6..e180fec 100644
--- a/firmware/ice40-riscv/icE1usb/usb_e1.c
+++ b/firmware/ice40-riscv/icE1usb/usb_e1.c
@@ -48,9 +48,6 @@ unsigned int e1_tx_level(void);
 unsigned int e1_rx_level(void);
 /* ---- */
 
-bool
-usb_ep_boot(const struct usb_intf_desc *intf, uint8_t ep_addr, bool dual_bd);
-
 static void
 _usb_fill_feedback_ep(void)
 {