diff --git a/README.md b/README.md
index af27495..e858d99 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ Issues can be [submitted](https://github.com/OvercastNetwork/Issues/issues/new)
 * Be clear and concise in your description
 * Take advantage of [GitHub Flavored Markdown](http://github.github.com/github-flavored-markdown/)--it's awesome, and it makes your submission that much better! :smile:
 * Use a *vanilla* environment, making sure to remove any browser extensions or client-side mods
+* Use a [fenced code block](https://help.github.com/articles/github-flavored-markdown#fenced-code-blocks) if you need to include an XML reference on a map issue
 
 ### Do not: