diff --git a/getting-started/setup-building.rst b/getting-started/setup-building.rst
index fde4498b4..f6a6f6a94 100644
--- a/getting-started/setup-building.rst
+++ b/getting-started/setup-building.rst
@@ -1094,7 +1094,7 @@ every rule.
      See also :ref:`building-doc`.
 
 ``Grammar``
-     Contains the :abbr:`EBNF (Extended Backus-Naur Form)` grammar file for
+     Contains the :abbr:`PEG (Parser Expression Grammar)` grammar file for
      Python.
 
 ``Include``