diff --git a/README.md b/README.md
index 86238d5..794525c 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,14 @@ etcd-cpp-api is a C++ API for [etcd](ssh://git@bud-git01.emea.nsn-net.net/etcd-c
    * [Catch](https://github.com/philsquared/Catch) for testing 
    * protobuf (https://github.com/google/protobuf/blob/master/src/README.md)
    * grpc (https://github.com/grpc/grpc/blob/release-0_14/INSTALL.md)
+   
+## Compatible etcd version
+While developing the etcd-cpp-api for etcd version 3, we found a bug in etcd and was
+eventually fixed in master branch(see: https://github.com/coreos/etcd/issues/5504#event-684957506).
+This means that the etcd to be used with this etcd cpp client should be build from latest sources
+in etcd master branch as this fix is not yet part of any etcd release.
+See etcd documentation on how to build etcd from source:
+https://github.com/coreos/etcd/blob/master/Documentation/dl_build.md
 
 ## Updates from etcdv2 cpp client to etcdv3 cpp client  
 See "handling directory nodes" section