builtin -> built-in.
diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst
index 5c1d5c4..82ca6e3 100644
--- a/Doc/library/ast.rst
+++ b/Doc/library/ast.rst
@@ -22,7 +22,7 @@
grammar looks like.
An abstract syntax tree can be generated by passing :data:`ast.PyCF_ONLY_AST` as
-a flag to the :func:`compile` builtin function, or using the :func:`parse`
+a flag to the :func:`compile` built-in function, or using the :func:`parse`
helper provided in this module. The result will be a tree of objects whose
classes all inherit from :class:`ast.AST`. An abstract syntax tree can be
compiled into a Python code object using the built-in :func:`compile` function.