diff --git a/app/steps/sendProxyRequest.js b/app/steps/sendProxyRequest.js
index 6764ecfb..0efbca74 100644
--- a/app/steps/sendProxyRequest.js
+++ b/app/steps/sendProxyRequest.js
@@ -50,7 +50,7 @@ function sendProxyRequest(Container) {
       if (bodyContent.length) {
         var body = bodyContent;
         var contentType = proxyReq.getHeader('Content-Type');
-        if (contentType === 'x-www-form-urlencoded' || contentType === 'application/x-www-form-urlencoded') {
+        if (contentType && contentType.match(/x-www-form-urlencoded/)) {
           try {
             var params = JSON.parse(body);
             body = Object.keys(params).map(function(k) { return k + '=' + params[k]; }).join('&');
diff --git a/test/getBody.js b/test/getBody.js
index 7ef58bfe..75a6e89c 100644
--- a/test/getBody.js
+++ b/test/getBody.js
@@ -30,6 +30,7 @@ describe('when proxy request is a GET', function () {
 
   var testCases = [
     { name: 'form encoded', encoding: 'application/x-www-form-urlencoded' },
+    { name: 'form encoded with charset', encoding: 'application/x-www-form-urlencoded; charset=UTF-8' }, // #488
     { name: 'JSON encoded', encoding: 'application/json' }
   ];