diff --git a/include/users.conf b/include/users.conf
index 544e1a9..2c759cf 100644
--- a/include/users.conf
+++ b/include/users.conf
@@ -34,6 +34,9 @@ Y%400%90%%100%256000%1.1%1.1
 #include include/ilines.ch.conf
 #include include/ilines.li.conf
 
+# SixXS prefixes
+#include include/ilines.sixxs.conf
+
 # RIPE DB 'delegation' supplied I lines per AS (IPv4 and IPv6)
 #include include/ilines.asn.conf