diff --git a/README.md b/README.md
index 6766c439..3a5a6627 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,7 @@ links to community and other things.
 
 Feel free to submit issues if you run into problems or you have suggestions on 
 how to improve it!
+
+You generally should not submit Pull Requests against the HTML in this repository.
+Instead, modify the Markdown source in the [dotnet/core-docs](https://github.com/dotnet/core-docs)
+repository and submit your Pull Requests there.