diff --git a/src/ng/directive/input.js b/src/ng/directive/input.js
index fa6fe55d9f5e..b38d22563ed9 100644
--- a/src/ng/directive/input.js
+++ b/src/ng/directive/input.js
@@ -1598,7 +1598,7 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
    *        `ngModel.$validators` pipeline which is designed to handle validations with true/false values.
    *
    * @param {string} validationErrorKey Name of the validator. the `validationErrorKey` will assign
-   *        to `$error[validationErrorKey]=isValid` so that it is available for data-binding.
+   *        to `$error[validationErrorKey]=!isValid` so that it is available for data-binding.
    *        The `validationErrorKey` should be in camelCase and will get converted into dash-case
    *        for class name. Example: `myError` will result in `ng-valid-my-error` and `ng-invalid-my-error`
    *        class and can be bound to as  `{{someForm.someControl.$error.myError}}` .