diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
index accd06a45..a86acaf22 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
@@ -327,7 +327,8 @@ static void xhci_legacy_init ( struct xhci_host *xhci ) {
 	/* Check if legacy USB support is enabled */
 	USB_LOG_DBG("XHCI %s bios offset 0x%x\n", xhci->name, (xhci->cap + legacy + XHCI_USBLEGSUP_BIOS));
 	/* bios = readb ( xhci->cap + legacy + XHCI_USBLEGSUP_BIOS ); cannot access offset 0x2, work around */
-	bios = readl ( xhci->cap + legacy );
+//	bios = readl ( xhci->cap + legacy );
+	bios = readl ( xhci->cap_addr + legacy );
 	bios = (bios >> 16) & 0xffff;
 	if ( ! ( bios & XHCI_USBLEGSUP_BIOS_OWNED ) ) {
 		/* Not an error; already owned by OS */