diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c
index ee8a1fad5c..eb59d979a5 100644
--- a/payloads/libpayload/drivers/usb/ehci.c
+++ b/payloads/libpayload/drivers/usb/ehci.c
@@ -776,6 +776,7 @@ ehci_init (unsigned long physical_bar)
 	int i;
 	hci_t *controller = new_controller ();
 	controller->instance = xzalloc(sizeof (ehci_t));
+	controller->reg_base = (uintptr_t)physical_bar;
 	controller->type = EHCI;
 	controller->start = ehci_start;
 	controller->stop = ehci_stop;
diff --git a/payloads/libpayload/drivers/usb/ohci.c b/payloads/libpayload/drivers/usb/ohci.c
index 0dfda17456..dcf7169f6a 100644
--- a/payloads/libpayload/drivers/usb/ohci.c
+++ b/payloads/libpayload/drivers/usb/ohci.c
@@ -173,6 +173,7 @@ ohci_init (unsigned long physical_bar)
 
 	hci_t *controller = new_controller ();
 	controller->instance = xzalloc(sizeof (ohci_t));
+	controller->reg_base = (uintptr_t)physical_bar;
 	controller->type = OHCI;
 	controller->start = ohci_start;
 	controller->stop = ohci_stop;