diff --git a/sys/dev/usb/wlan/if_urtwn.c b/sys/dev/usb/wlan/if_urtwn.c
index 7f69f9617e3e..f6bea414a926 100644
--- a/sys/dev/usb/wlan/if_urtwn.c
+++ b/sys/dev/usb/wlan/if_urtwn.c
@@ -1302,6 +1302,7 @@ urtwn_r88e_read_rom(struct urtwn_softc *sc)
 	uint8_t off, msk, tmp;
 	int i;
 
+	off = 0;
 	urtwn_efuse_switch_power(sc);
 
 	/* Read full ROM image. */