diff --git a/README.org b/README.org
index d76dec8..e8b4b2b 100644
--- a/README.org
+++ b/README.org
@@ -54,6 +54,7 @@ podman network create
 The next steps assume this network name is podman1, the default first network name. If you need to name it something else, change the ~--network~ line in the makefile target. This will be polished later.
 * Run libero from inside the container
 #+begin_src bash
+export LIBERO_LICENSE_MAC=<your mac address>
 make bash
 #+end_src