diff --git a/firmware/usb.c b/firmware/usb.c
index 3491e43328..9fd18187b3 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -85,7 +85,7 @@ static int countdown;
 
 static int usb_state;
 
-#ifdef HAVE_MMC
+#if defined(HAVE_MMC) && !defined(BOOTLOADER)
 static int usb_mmc_countdown = 0;
 #endif