diff --git a/transparent-gateway-details.rst b/transparent-gateway-details.rst
index 0aeaebe775888817456e3e1bde14b63209361ac5..1030e5cffafcddef2d41863dd37c08acf1d4bf57 100644
--- a/transparent-gateway-details.rst
+++ b/transparent-gateway-details.rst
@@ -26,6 +26,13 @@ The current manual process is quite intricated, but expect vast improvements in
    $ docker pull openthread/environment:latest
    $ docker run -it --rm openthread/environment bash
 
+.. note::
+
+      You may receive `permission denied` error message.
+      Solution is available on the
+      `docker docs website <https://docs.docker.com/engine/install/linux-postinstall/#manage-docker-as-a-non-root-user>`_ 
+      
+
 - Inside the docker container prepare the build as follows:
 
 .. code-block:: bash