diff --git a/README.md b/README.md
index c452c7e30c3..0255578c54f 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # The Servo Parallel Browser Project
 
 Servo is a prototype web browser engine written in the [Rust](https://github.com/mozilla/rust)
-language. It is currently developed on OS X and 64bit Linux.
+language. It is currently developed on 64bit OS X and 64bit Linux.
 
 ## Prerequisites