diff --git a/README.md b/README.md
index fe2a6c3..5511c12 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Sugar [![Build Status](https://travis-ci.org/mbutterick/sugar.svg)](https://travis-ci.org/mbutterick/sugar)
+Sugar [![Build Status](https://travis-ci.org/mbutterick/sugar.svg?branch=master)](https://travis-ci.org/mbutterick/sugar)
 -----
 
 Functions that improve the readability of Racket code.