diff --git a/src/cmd/rio/mkriorules.sh b/src/cmd/rio/mkriorules.sh
index 6918d991..76dda36b 100644
--- a/src/cmd/rio/mkriorules.sh
+++ b/src/cmd/rio/mkriorules.sh
@@ -1,4 +1,4 @@
-if [ "x$WSYSTYPE" = xnowsys ]; then
+if [ "x$WSYSTYPE" != xx11 ]; then
 	echo 'all install clean nuke:Q:'
 	echo '	#'
 	exit 0