diff --git a/README.rst b/README.rst
index 0f46b752850d3f0c71385104f42a6c5e0b4ac27b_UkVBRE1FLnJzdA==..582776bbee6c28edac8a2614d42416b0c9b1bfc7_UkVBRE1FLnJzdA== 100644
--- a/README.rst
+++ b/README.rst
@@ -21,3 +21,9 @@
 is particularly useful for implementing protocols such as JSON-RPC
 that have a richer type system than JSON itself.
 
+For those of you that have legacy systems to maintain, there is a
+very old fork of simplejson in the [python2.2] branch that supports
+Python 2.2. This is based off of a very old version of simplejson,
+is not maintained, and should only be used as a last resort.
+
+[python2.2]: https://github.com/simplejson/simplejson/tree/python2.2