diff --git a/source/robots.txt b/source/robots.txt
index 1f53798..860e8be 100644
--- a/source/robots.txt
+++ b/source/robots.txt
@@ -1,2 +1,3 @@
+# This file only applies to mirrors, see "robots-mdleom.com.txt"
 User-agent: *
 Disallow: /