diff --git a/lib/utils.js b/lib/utils.js
index 0b970255c9..298fdbc27e 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -261,7 +261,7 @@ exports.slug = function(str) {
 exports.clean = function(str) {
   str = str
     .replace(/\r\n?|[\n\u2028\u2029]/g, '\n').replace(/^\uFEFF/, '')
-    .replace(/^function *\(.*\)\s*{|\(.*\) *=> *{?/, '')
+    .replace(/^function *\(.*\)\s*\{|\(.*\) *=> *\{?/, '')
     .replace(/\s+\}$/, '');
 
   var spaces = str.match(/^\n?( *)/)[1].length;