diff --git a/sys/arm/ti/ti_adc.c b/sys/arm/ti/ti_adc.c
index e8dd6d835f7d..9f545e0e4a38 100644
--- a/sys/arm/ti/ti_adc.c
+++ b/sys/arm/ti/ti_adc.c
@@ -732,7 +732,7 @@ ti_adc_attach(device_t dev)
 	sc->sc_charge_delay = DEFAULT_CHARGE_DELAY;
 	/* Read "tsc" node properties */
 	child = ofw_bus_find_child(node, "tsc");
-	if (child != 0) {
+	if (child != 0 && OF_hasprop(child, "ti,wires")) {
 		if ((OF_getprop(child, "ti,wires", &cell, sizeof(cell))) > 0)
 			sc->sc_tsc_wires = fdt32_to_cpu(cell);
 		if ((OF_getprop(child, "ti,coordinate-readouts", &cell, sizeof(cell))) > 0)
@@ -745,7 +745,7 @@ ti_adc_attach(device_t dev)
 		    sizeof(*wire_configs), (void **)&wire_configs);
 		if (nwire_configs != sc->sc_tsc_wires) {
 			device_printf(sc->sc_dev,
-			    "invalid nubmer of ti,wire-config: %d (should be %d)\n",
+			    "invalid number of ti,wire-config: %d (should be %d)\n",
 			    nwire_configs, sc->sc_tsc_wires);
 			OF_prop_free(wire_configs);
 			return (EINVAL);