diff --git a/Makefile b/Makefile
index 765eb11c092898e1858aa42379950e48616a3b14..f72802c4bcfd1c433af9c077aba7acc6ce568d5c 100644
--- a/Makefile
+++ b/Makefile
@@ -102,18 +102,18 @@ publish:
 # Publish an opam description.
 	@ opam publish -v $(DATE) $(THIS_SPACES) $(ARCHIVE)
 
+# ------------------------------------------------------------------------------
+
+# Documentation.
+
 DOCDIR = _build/default/_doc/_html
 DOC    = $(DOCDIR)/index.html
-CSS    = $(DOCDIR)/odoc.css
-
-# ------------------------------------------------------------------------------
 
 .PHONY: doc
 doc:
 	@ rm -rf _build/default/_doc
 	@ dune clean
 	@ dune build @doc
-	@ sed -i.bak 's/font-weight: 500;/font-weight: bold;/' $(CSS) && rm -f $(CSS).bak
 	@ echo "You can view the documentation by typing 'make view'".
 
 .PHONY: view