diff --git a/chip/stm32/usb_dwc_hw.h b/chip/stm32/usb_dwc_hw.h
index 01ff3b7e77..81637c3f17 100644
--- a/chip/stm32/usb_dwc_hw.h
+++ b/chip/stm32/usb_dwc_hw.h
@@ -28,7 +28,7 @@ extern void (*usb_ep_rx[]) (void);
 extern void (*usb_ep_reset[]) (void);
 struct usb_setup_packet;
 /* EP0 Interface handler callbacks */
-static int (*usb_iface_request[]) (struct usb_setup_packet *req);
+extern int (*usb_iface_request[]) (struct usb_setup_packet *req);
 
 
 /* True if the HW Rx/OUT FIFO is currently listening. */