diff --git a/sys/dev/iicbus/ds13rtc.c b/sys/dev/iicbus/ds13rtc.c
index e2e6b0aca5e1..7a125c07ad1e 100644
--- a/sys/dev/iicbus/ds13rtc.c
+++ b/sys/dev/iicbus/ds13rtc.c
@@ -495,7 +495,7 @@ ds13rtc_get_chiptype(device_t dev)
 	 * We can only attach if provided a chiptype hint string.
 	 */
 	if (resource_string_value(device_get_name(dev), 
-	    device_get_unit(dev), "chiptype", &htype) != 0)
+	    device_get_unit(dev), "compatible", &htype) != 0)
 		return (TYPE_NONE);
 
 	/*