diff --git a/docs/style-guide.rst b/docs/style-guide.rst
index 35e7324c9..e8582c196 100644
--- a/docs/style-guide.rst
+++ b/docs/style-guide.rst
@@ -1275,6 +1275,10 @@ Enums
 
 Enums, in the style of simple type declarations, should be named using the CapWords style. Examples: ``TokenGroup``, ``Frame``, ``HashStyle``, ``CharacterLocation``.
 
+Immutable variables
+===================
+
+
 
 Avoiding Naming Collisions
 ==========================