diff --git a/lib/domains/mx/com/ujsierra.txt b/lib/domains/mx/com/ujsierra.txt
new file mode 100644
index 0000000000..d68a07b563
--- /dev/null
+++ b/lib/domains/mx/com/ujsierra.txt
@@ -0,0 +1 @@
+Justo Sierra
\ No newline at end of file