diff --git a/doc/source/configuration.rst b/doc/source/configuration.rst
index 6052576..96f91ec 100644
--- a/doc/source/configuration.rst
+++ b/doc/source/configuration.rst
@@ -56,6 +56,7 @@
    before they are started
 -  **extra** - runs after services are started and before any files in
    ``extra.d`` are executed
+-  **post-extra** - runs after files in ``extra.d`` are executed
 
 The file is processed strictly in sequence; meta-sections may be
 specified more than once but if any settings are duplicated the last to