diff --git a/doc/en/reference/reference.rst b/doc/en/reference/reference.rst
index 6a5512cc1..7107218b3 100644
--- a/doc/en/reference/reference.rst
+++ b/doc/en/reference/reference.rst
@@ -1918,7 +1918,8 @@ All the command-line flags can be obtained by running ``pytest --help``::
       --strict-markers      Markers not registered in the `markers` section of
                             the configuration file raise errors
       --strict              (Deprecated) alias to --strict-markers
-      -c file               Load configuration from `file` instead of trying to
+      -c, --config-file FILE
+                            Load configuration from `FILE` instead of trying to
                             locate one of the implicit configuration files
       --continue-on-collection-errors
                             Force test execution even if collection errors occur