diff --git a/atom/browser/api/atom_api_web_request.cc b/atom/browser/api/atom_api_web_request.cc
index ff1e2254b89b..d8526e03ad8f 100644
--- a/atom/browser/api/atom_api_web_request.cc
+++ b/atom/browser/api/atom_api_web_request.cc
@@ -26,6 +26,7 @@ struct Converter<URLPattern> {
     std::string pattern;
     if (!ConvertFromV8(isolate, val, &pattern))
       return false;
+    *out = URLPattern(URLPattern::SCHEME_ALL);
     return out->Parse(pattern) == URLPattern::PARSE_SUCCESS;
   }
 };