diff --git a/lib/adapters/xhr.js b/lib/adapters/xhr.js
index 5575925285..76784f3db0 100644
--- a/lib/adapters/xhr.js
+++ b/lib/adapters/xhr.js
@@ -212,7 +212,7 @@ module.exports = function xhrAdapter(config) {
 
     var protocol = parseProtocol(fullPath);
 
-    if (protocol && [ 'http', 'https', 'file' ].indexOf(protocol) === -1) {
+    if (protocol && [ 'http', 'https', 'file', 'blob' ].indexOf(protocol) === -1) {
       reject(new AxiosError('Unsupported protocol ' + protocol + ':', AxiosError.ERR_BAD_REQUEST, config));
       return;
     }