diff --git a/src/Angular.js b/src/Angular.js
index c5e54c98b6d6..5caf466578f4 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -755,7 +755,8 @@ function toJsonReplacer(key, value) {
  * @function
  *
  * @description
- * Serializes input into a JSON-formatted string.
+ * Serializes input into a JSON-formatted string. Properties with leading $ characters will be
+ * stripped since angular uses this notation internally.
  *
  * @param {Object|Array|Date|string|number} obj Input to be serialized into JSON.
  * @param {boolean=} pretty If set to true, the JSON output will contain newlines and whitespace.