diff --git a/lib/adapters/http.js b/lib/adapters/http.js
index dbb2ae14e3..a39773f9f7 100755
--- a/lib/adapters/http.js
+++ b/lib/adapters/http.js
@@ -293,7 +293,7 @@ module.exports = function httpAdapter(config) {
         });
 
         stream.on('end', function handleStreamEnd() {
-          var responseData = Buffer.concat(responseBuffer);
+          var responseData = responseBuffer.length === 1 ? responseBuffer[0] : Buffer.concat(responseBuffer);
           if (config.responseType !== 'arraybuffer') {
             responseData = responseData.toString(config.responseEncoding);
             if (!config.responseEncoding || config.responseEncoding === 'utf8') {