diff --git a/lodash.js b/lodash.js
index 2a0b9bd27..369a1fc8d 100644
--- a/lodash.js
+++ b/lodash.js
@@ -95,6 +95,7 @@
       numberTag = '[object Number]',
       objectTag = '[object Object]',
       promiseTag = '[object Promise]',
+      proxyTag = '[object Proxy]',
       regexpTag = '[object RegExp]',
       setTag = '[object Set]',
       stringTag = '[object String]',
@@ -11570,7 +11571,7 @@
       // The use of `Object#toString` avoids issues with the `typeof` operator
       // in Safari 8-9 which returns 'object' for typed array and other constructors.
       var tag = isObject(value) ? objectToString.call(value) : '';
-      return tag == funcTag || tag == genTag;
+      return tag == funcTag || tag == genTag || tag == proxyTag;
     }
 
     /**