diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ef1f3a1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+Obsolete A5/3 and GEA3 plug-in library to libosmocore
+-----------------------------------------------------
+
+Please note this library is obsolete, as support for A5/3 and GEA3
+encryption has been merged to libosmocore.git in git commit
+4f169500df996d0a7a804da77bae07b2ecd0d813 in June 2016.
+
+See <http://git.osmocom.org/libosmocore/commit/?id=4f169500df996d0a7a804da77bae07b2ecd0d813> for more details.