diff --git a/elements/os-refresh-config/README.md b/elements/os-refresh-config/README.md
index a5f97134a..6122ad5e3 100644
--- a/elements/os-refresh-config/README.md
+++ b/elements/os-refresh-config/README.md
@@ -5,3 +5,12 @@ of directories. Its intended purpose is to quiesce (pre-configure.d),
 configure (configure.d), migrate (migration.d), and then activate
 (post-configure.d) a configuration on first boot or in response to Heat
 Metadata changes.
+
+To cause a script to be run on every os-refresh-config run, install
+it into one of the following directories:
+````
+/opt/stack/os-refresh-config/pre-configure.d
+/opt/stack/os-refresh-config/configure.d
+/opt/stack/os-refresh-config/migration.d
+/opt/stack/os-refresh-config/post-configure.d
+```