diff --git a/sys/dev/usb/controller/ehci_pci.c b/sys/dev/usb/controller/ehci_pci.c
index c8d2d61a670..7e87762c32a 100644
--- a/sys/dev/usb/controller/ehci_pci.c
+++ b/sys/dev/usb/controller/ehci_pci.c
@@ -93,8 +93,6 @@ __FBSDID("$FreeBSD$");
 #define	PCI_EHCI_VENDORID_NVIDIA2	0x10DE
 #define	PCI_EHCI_VENDORID_VIA		0x1106
 
-#define	PCI_EHCI_BASE_REG	0x10
-
 static void ehci_pci_takecontroller(device_t self);
 
 static device_probe_t ehci_pci_probe;
diff --git a/sys/dev/usb/controller/ehcireg.h b/sys/dev/usb/controller/ehcireg.h
index 4da80c0488e..ab81f08cf30 100644
--- a/sys/dev/usb/controller/ehcireg.h
+++ b/sys/dev/usb/controller/ehcireg.h
@@ -55,7 +55,7 @@
 
 /* EHCI capability registers */
 #define	EHCI_CAPLENGTH		0x00	/* RO Capability register length field */
-/* reserved			0x01 */
+#define	EHCI_RESERVED		0x01	/* Reserved register */
 #define	EHCI_HCIVERSION		0x02	/* RO Interface version number */
 #define	EHCI_HCSPARAMS		0x04	/* RO Structural parameters */
 #define	EHCI_HCS_DEBUGPORT(x)	(((x) >> 20) & 0xf)