diff --git a/lodash.js b/lodash.js
index b9d2f73eb..5b8361655 100644
--- a/lodash.js
+++ b/lodash.js
@@ -1343,6 +1343,7 @@
         nativeFloor = Math.floor,
         nativeGetPrototype = Object.getPrototypeOf,
         nativeGetSymbols = Object.getOwnPropertySymbols,
+        nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
         nativeIsFinite = context.isFinite,
         nativeJoin = arrayProto.join,
         nativeKeys = Object.keys,
@@ -10724,9 +10725,7 @@
      * _.isBuffer(new Uint8Array(2));
      * // => false
      */
-    var isBuffer = !Buffer ? stubFalse : function(value) {
-      return value instanceof Buffer;
-    };
+    var isBuffer = nativeIsBuffer || stubFalse;
 
     /**
      * Checks if `value` is classified as a `Date` object.