diff --git a/test/boot/bootstd_common.h b/test/boot/bootstd_common.h
index 4a126e4..e29036c 100644
--- a/test/boot/bootstd_common.h
+++ b/test/boot/bootstd_common.h
@@ -53,4 +53,12 @@
  */
 int bootstd_test_check_mmc_hunter(struct unit_test_state *uts);
 
+/**
+ * bootstd_reset_usb() - Reset the USB subsystem
+ *
+ * Resets USB so that it can be started (and scanning) again. This is useful in
+ * tests which need to use USB.
+ */
+void bootstd_reset_usb(void);
+
 #endif