diff --git a/docs/usage.rst b/docs/usage.rst
index 3dc040ad..d5cb546f 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -61,6 +61,7 @@ The full documentation can be issued by running with ``environment --help``:
                                     [--validate | --no-validate]
                                     [-o <file>] [--sv <version>] [--of <format>]
                                     [--pyproject <file>] [--mc-type <type>]
+                                    [-S]
                                     [<python>]
 
     Build an SBOM from Python (virtual) environment