diff --git a/lodash.js b/lodash.js
index 006b0d88b..5ceb5ea3d 100644
--- a/lodash.js
+++ b/lodash.js
@@ -115,10 +115,10 @@
   /** Used to assign default `context` object properties */
   var contextProps = [
     'Array', 'ArrayBuffer', 'Date', 'Error', 'Float32Array', 'Float64Array',
-    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Math', 'Number', 'Object',
-    'RegExp', 'Set', 'String', '_', 'clearTimeout', 'document', 'isFinite', 'isNaN',
-    'parseInt', 'setTimeout', 'TypeError', 'Uint8Array', 'Uint8ClampedArray',
-    'Uint16Array', 'Uint32Array', 'window', 'WinRTError'
+    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Math', 'Number',
+    'Object', 'RegExp', 'Set', 'String', '_', 'clearTimeout', 'document',
+    'isFinite', 'parseInt', 'setTimeout', 'TypeError', 'Uint8Array',
+    'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'window', 'WinRTError'
   ];
 
   /** Used to fix the JScript `[[DontEnum]]` bug */
@@ -687,7 +687,6 @@
         nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
         nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
         nativeIsFinite = context.isFinite,
-        nativeIsNaN = context.isNaN,
         nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
         nativeMax = Math.max,
         nativeMin = Math.min,