diff --git a/ci/README.rst b/ci/README.md
similarity index 62%
rename from ci/README.rst
rename to ci/README.md
index 5be2a79d987767f6f54fe3f3d2040ca7ec448768..bf1daf7d3925c7fdcf8cab506ab3f82850beb15f 100644
--- a/ci/README.rst
+++ b/ci/README.md
@@ -2,3 +2,5 @@ Continuous integration howto
 ============================
 
 See scripts in utils to build, run, push and pull the docker image for continuous integration tests.
+
+OpenCL is not working on Windows yet due to issue https://github.com/microsoft/WSL/issues/6951.