diff --git a/lib/reporter.js b/lib/reporter.js
index ebf6dc207..e0c5fb65f 100644
--- a/lib/reporter.js
+++ b/lib/reporter.js
@@ -21,7 +21,7 @@ var createErrorFormatter = function (basePath, emitter, SourceMapConsumer) {
     return null
   }
 
-  var URL_REGEXP = new RegExp('http:\\/\\/[^\\/]*\\/' +
+  var URL_REGEXP = new RegExp('\\/' +
     '(base|absolute)' + // prefix
     '((?:[A-z]\\:)?[^\\?\\s\\:]*)' + // path
     '(\\?\\w*)?' + // sha