diff --git a/CHANGES b/CHANGES
index 20e9472..df10505 100644
--- a/CHANGES
+++ b/CHANGES
@@ -66,6 +66,11 @@
   Adapt to OpenSSL 1.1.x api (r1750819)
 
 
+[ Note: All revision numbers for versions prior to 1.3.9 reference the
+  original repository on google code.  For more information see:
+  https://svn.apache.org/repos/asf/serf/README ]
+
+
 Serf 1.3.8 [2014-10-20, from /tags/1.3.8, r2441]
   Fix issue #152: CRC calculation error for gzipped http reponses > 4GB.
   Fix issue #153: SSPI CredHandle not freed when APR pool is destroyed.