diff --git a/lib/adapters/http.js b/lib/adapters/http.js
index d03db3a622..760efc3d0e 100755
--- a/lib/adapters/http.js
+++ b/lib/adapters/http.js
@@ -183,7 +183,7 @@ export default isHttpAdapterSupported && function httpAdapter(config) {
 
     // Parse url
     const fullPath = buildFullPath(config.baseURL, config.url);
-    const parsed = new URL(fullPath);
+    const parsed = new URL(fullPath, 'http://localhost');
     const protocol = parsed.protocol || supportedProtocols[0];
 
     if (protocol === 'data:') {