diff --git a/reactos/drivers/usb/nt4compat/usbdriver/ehci.c b/reactos/drivers/usb/nt4compat/usbdriver/ehci.c
index f673b17bd16..172e9c0d6fa 100644
--- a/reactos/drivers/usb/nt4compat/usbdriver/ehci.c
+++ b/reactos/drivers/usb/nt4compat/usbdriver/ehci.c
@@ -3439,7 +3439,7 @@ ehci_probe(PDRIVER_OBJECT drvr_obj, PUNICODE_STRING reg_path, PUSB_DEV_MANAGER d
     pdev = NULL;
 
     //scan the bus to find ehci controller
-    for(bus = 0; bus < 2; bus++)        /*enum only bus0 and bus1 */
+    for(bus = 0; bus < 3; bus++)        /* enum bus0-bus2 */
     {
         for(i = 0; i < PCI_MAX_DEVICES; i++)
         {
diff --git a/reactos/drivers/usb/nt4compat/usbdriver/uhci.c b/reactos/drivers/usb/nt4compat/usbdriver/uhci.c
index 0fad46868be..7fb279df573 100644
--- a/reactos/drivers/usb/nt4compat/usbdriver/uhci.c
+++ b/reactos/drivers/usb/nt4compat/usbdriver/uhci.c
@@ -627,7 +627,7 @@ uhci_probe(PDRIVER_OBJECT drvr_obj, PUNICODE_STRING reg_path, PUSB_DEV_MANAGER d
     pdev = NULL;
 
     //scan the bus to find uhci controller
-    for(bus = 0; bus < 2; bus++)        /*enum only bus0 and bus1 */
+    for(bus = 0; bus < 3; bus++)        /* enum bus0-bus2 */
     {
         for(i = 0; i < PCI_MAX_DEVICES; i++)
         {