diff --git a/docs/ref/models/expressions.txt b/docs/ref/models/expressions.txt
index be89a2435f..988652d0e7 100644
--- a/docs/ref/models/expressions.txt
+++ b/docs/ref/models/expressions.txt
@@ -985,6 +985,8 @@ calling the appropriate methods on the wrapped expression.
         A hook allowing the expression to coerce ``value`` into a more
         appropriate type.
 
+        ``expression`` is the same as ``self``.
+
     .. method:: get_group_by_cols(alias=None)
 
         Responsible for returning the list of columns references by
diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index c0a005e7a9..b896fbb29d 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -2075,6 +2075,8 @@ Field API reference
         backend already returns the correct Python type, or the backend itself
         does the conversion.
 
+        ``expression`` is the same as ``self``.
+
         See :ref:`converting-values-to-python-objects` for usage.
 
         .. note::