diff --git a/rest_framework/utils/json.py b/rest_framework/utils/json.py
index ea5e22725..cb5572380 100644
--- a/rest_framework/utils/json.py
+++ b/rest_framework/utils/json.py
@@ -1,3 +1,10 @@
+"""
+Wrapper for the builtin json module that ensures compliance with the JSON spec.
+
+REST framework should always import this wrapper module in order to maintain
+spec-compliant encoding/decoding. Support for non-standard features should be
+handled by users at the renderer and parser layer.
+"""
 
 from __future__ import absolute_import