diff --git a/server.js b/server.js
index 6d60721..767285b 100644
--- a/server.js
+++ b/server.js
@@ -240,11 +240,15 @@ function(data, match, end, ask) {
 });
 
 // Coveralls integration.
-camp.route(/^\/coveralls\/(.*)\.(svg|png|gif|jpg)$/,
+camp.route(/^\/coveralls\/([^\/]+\/[^\/]+)(?:\/(.+))?\.(svg|png|gif|jpg)$/,
 function(data, match, end, ask) {
   var userRepo = match[1];  // eg, `jekyll/jekyll`.
-  var format = match[2];
-  var apiUrl = 'https://coveralls.io/repos/' + userRepo + '/badge.png?branch=master';
+  var branch = match[2];
+  var format = match[3];
+  var apiUrl = 'https://coveralls.io/repos/' + userRepo + '/badge.png';
+  if (branch) {
+    apiUrl += '?branch=' + branch;
+  }
   var badgeData = {text:['coverage', 'n/a'], colorscheme:'lightgrey'};
   https.get(apiUrl, function(res) {
     // We should get a 302. Look inside the Location header.
diff --git a/web/index.html b/web/index.html
index 2583a9a..f76601d 100644
--- a/web/index.html
+++ b/web/index.html
@@ -98,10 +98,13 @@ Use an underscore <code>_</code> if you want a space. Or, you know, use a space.
   <td><img src='/gittip/JSFiddle.svg' alt='Gittip'/></td>
   <td><code>http://b.adge.me/gittip/JSFiddle.svg</code></td>
   </tr>
-  <tr><th> Coveralls: </th>
+  <tr><th> Coveralls (repo): </th>
   <td><img src='/coveralls/jekyll/jekyll.svg' alt='Coveralls'/></td>
   <td><code>http://b.adge.me/coveralls/jekyll/jekyll.svg</code></td>
   </tr>
+  <tr><th> Coveralls (branch): </th>
+  <td><img src='/coveralls/jekyll/jekyll/master.svg' alt='Coveralls'/></td>
+  <td><code>http://b.adge.me/coveralls/jekyll/jekyll/master.svg</code></td>
   </tr>
   <tr><th> npm: </th>
   <td><img src='/npm/dm/localeval.svg' alt='npm'/></td>