diff --git a/docs/settings.rst b/docs/settings.rst
index ac273aac..138ca592 100644
--- a/docs/settings.rst
+++ b/docs/settings.rst
@@ -48,6 +48,10 @@ The ``BOOTSTRAP5`` dict variable contains these settings and defaults:
         # The default value is empty, as Bootstrap5 example code doesn't use a wrapper class.
         'inline_wrapper_class': '',
 
+        # Field class for inline fields.
+        # the default value is "col-12". This class will combined with `inline_wrapper_class`.
+        'inline_field_class': 'col-auto',
+
         # Label class to use in horizontal forms.
         'horizontal_label_class': 'col-sm-2',