diff --git a/snippets/deepFreeze.md b/snippets/deepFreeze.md
index fc9d1ef9a..6193d9d72 100644
--- a/snippets/deepFreeze.md
+++ b/snippets/deepFreeze.md
@@ -12,7 +12,7 @@ Finally, use `Object.freeze()` to freeze the given object.
 ```js
 const deepFreeze = obj => {
   Object.keys(obj).forEach(prop => {
-    if (obj[prop] === 'object' && !Object.isFrozen(obj[prop])) deepFreeze(v[prop]);
+    if (typeof(obj[prop]) === 'object' && !Object.isFrozen(obj[prop])) deepFreeze(obj[prop]);
   });
   return Object.freeze(obj);
 };