diff --git a/doc/make.bat b/doc/make.bat
index 12b8a86..7df189a 100644
--- a/doc/make.bat
+++ b/doc/make.bat
@@ -7,7 +7,8 @@ REM Command file for Sphinx documentation
 if "%SPHINXBUILD%" == "" (
 	set SPHINXBUILD=sphinx-build
 )
-set SOURCEDIR=source
+set SPHINXOPTS=-W
+set SOURCEDIR=api
 set BUILDDIR=%SOURCEDIR%/build
 set SPHINXPROJ=Pybricks