diff --git a/doc/public/Makefile b/doc/public/Makefile
index 1a8c303a17..f162e1b05c 100644
--- a/doc/public/Makefile
+++ b/doc/public/Makefile
@@ -5,7 +5,7 @@
 SPHINXOPTS    =
 SPHINXBUILD   = sphinx-build
 PAPER         =
-BUILDDIR      = ../..
+BUILDDIR      = _build
 
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4