diff --git a/sys/conf/majors b/sys/conf/majors
index bc089e9bf41..4101075aaea 100644
--- a/sys/conf/majors
+++ b/sys/conf/majors
@@ -159,5 +159,6 @@ chrdev	name		comments
 140	pcfclock	PCFCLOCK <sascha@schumann.cx>
 141	pcdmx		PCDMX theatre lighting controller
 142	skip		SKIP port (security/skip) control device
+143	urio		USB Rio 500 <n_hibma>
 200	??		entries from 200-255 are reserved for local use
 255	??		entries from 200-255 are reserved for local use