Index: sys/arm/ti/ti_mbox.c
===================================================================
--- sys/arm/ti/ti_mbox.c
+++ sys/arm/ti/ti_mbox.c
@@ -136,7 +136,7 @@
 {
 	struct ti_mbox_softc *sc;
 	int rid, delay, chan;
-	uint32_t rev, sysconfig;
+	uint32_t rev, sysconfig __unused;
 
 	if (ti_sysc_clock_enable(device_get_parent(dev)) != 0) {
 		device_printf(dev, "could not enable MBOX clock\n");