diff --git a/pep-0511.txt b/pep-0511.txt
index 0cd209bca..0e8be8d6b 100644
--- a/pep-0511.txt
+++ b/pep-0511.txt
@@ -263,32 +263,32 @@ to join code transformer names to build the optimizer tag.
    ``PyParser_ASTFromStringObject()``.
 
 
-code_transformer()
-------------------
+code_transformer() method
+-------------------------
 
 Prototype::
 
-    def code_transformer(code, consts, names, lnotab, context):
+    def code_transformer(self, code, context):
         ...
-        return (code, consts, names, lnotab)
+        new_code = ...
+        ...
+        return new_code
 
 Parameters:
 
-* *code*: the bytecode (``bytes``)
-* *consts*: a sequence of constants
-* *names*: tuple of variable names
-* *lnotab*: table mapping instruction offsets to line numbers
-  (``bytes``)
+* *code*: code object
+
+The method must return a code object.
 
 The code transformer is run after the compilation to bytecode
 
 
-ast_transformer()
-------------------
+ast_transformer() method
+------------------------
 
 Prototype::
 
-    def ast_transformer(tree, context):
+    def ast_transformer(self, tree, context):
         ...
         return tree