diff --git a/README.md b/README.md
index ac00ef085bc..7d9a430a914 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ There are many ways to [contribute](https://github.com/Microsoft/TypeScript/blob
 
 ## Building
 
-In order to build the TypeScript compiler, ensure that you have [Git](http://git-scm.com/downloads) and [Node.js](http://nodejs.org/) installed.
+In order to build the TypeScript compiler, ensure that you have [Git](http://git-scm.com/downloads) and [Node.js](http://nodejs.org/) installed. Note that you need to have autocrlf off as we track whitespace changes (`git config --global core.autocrlf false`).
 
 Clone a copy of the repo: