diff --git a/packages/utils/src/serialize.js b/packages/utils/src/serialize.js
index d04bd31194..1ce3f17490 100644
--- a/packages/utils/src/serialize.js
+++ b/packages/utils/src/serialize.js
@@ -1,4 +1,3 @@
-
 import serialize from 'serialize-javascript'
 
 export function serializeFunction(func) {
@@ -15,7 +14,7 @@ export function serializeFunction(func) {
         return _
       }
     })
-    .replace(`${func.name}(`, 'function (')
+    .replace(`${func.name || 'function'}(`, 'function (')
 }
 
 serializeFunction.internalFunctionRE = /^(\s*)(?!(?:if)|(?:for)|(?:while)|(?:switch))(\w+)\s*\((.*?)\)\s*\{/gm