diff --git a/src/ngCookies/cookies.js b/src/ngCookies/cookies.js
index b78fcd5aaf8b..0c7f116d31ea 100644
--- a/src/ngCookies/cookies.js
+++ b/src/ngCookies/cookies.js
@@ -26,7 +26,7 @@ angular.module('ngCookies', ['ng']).
    * Provides read/write access to browser's cookies.
    *
    * Only a simple Object is exposed and by adding or removing properties to/from
-   * this object, new cookies are created/deleted at the end of current $eval.
+   * this object, new cookies are created/deleted at the end of current $eval.  The serializer only supports strings.
    *
    * Requires the {@link ngCookies `ngCookies`} module to be installed.
    *