diff --git a/drivers/usb/wusbcore/mmc.c b/drivers/usb/wusbcore/mmc.c
index 3b52161e6e9cd8d5af017879f78613eb11f7b729..2d827397e30b2dbddd121342a8899d9e028b0867 100644
--- a/drivers/usb/wusbcore/mmc.c
+++ b/drivers/usb/wusbcore/mmc.c
@@ -263,7 +263,7 @@ int wusbhc_chid_set(struct wusbhc *wusbhc, const struct wusb_ckhdid *chid)
 {
 	int result = 0;
 
-	if (memcmp(chid, &wusb_ckhdid_zero, sizeof(chid)) == 0)
+	if (memcmp(chid, &wusb_ckhdid_zero, sizeof(*chid)) == 0)
 		chid = NULL;
 
 	mutex_lock(&wusbhc->mutex);