diff --git a/index.html b/index.html
index fe8321aef..fd00cec9e 100644
--- a/index.html
+++ b/index.html
@@ -180,7 +180,7 @@
functions, extend, defaults, clone, tap,
isEqual, isEmpty, isElement,
isArray, isArguments, isFunction, isString,
- isNumber, isBoolean, isDate, isRegExp
+ isNumber, isBoolean, isDate, isRegExp,
isNaN, isNull,
isUndefined