diff --git a/README.md b/README.md
index e61e79a177d96737761c9d9547cb708e621a60e5..63bbeb73aa2f999bfa4f41082b82284137f1daf3 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,10 @@
 forge001
 ========
 
+This branch is compatible with libmongodb-perl 0.702.1+ds-1ubuntu1
+
 evolving perl modules
 
 * textarchive/ contains a group of modules which relate to http://sourceforge.net/projects/md5cat/ (MD5 catalog tools)
   and may replace that sometime.
+