diff --git a/doc/develop/codingstyle.rst b/doc/develop/codingstyle.rst
index 013bfebf7e4..7304eea0056 100644
--- a/doc/develop/codingstyle.rst
+++ b/doc/develop/codingstyle.rst
@@ -24,7 +24,7 @@ The following rules apply:
`_. Use `pylint
`_ for checking the code.
-* Use the `b4 `_ tool to prepare and
+* Use the `b4 `__ tool to prepare and
send your patches. b4 has become the preferred tool to sending patches for many
Linux kernel contributors, and U-Boot ships with a ready-to-use ``.b4-config`` that
targets ``u-boot@lists.denx.de`` and integrates with ``scripts/get_maintainer.pl`` for