diff --git a/.adoc-layout.conf b/.adoc-layout.conf
new file mode 100644
index 00000000..9ee8dff8
--- /dev/null
+++ b/.adoc-layout.conf
@@ -0,0 +1,275 @@
+# Document layout for AsciiDoc, based on the website.
+
+[header]
+
+
+
+
+
+ {doctitle}
+
+
+
+
+
+
+
+[footer]
+
+
+
diff --git a/Makefile b/Makefile
index 73c9dc0c..9d652f20 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@
VERSION=$(shell git describe --abbrev=8 --dirty 2>/dev/null || echo v0.12.0)
WADS=wads
ASCIIDOC=asciidoc
+ADOCOPTS=--backend=html5 --conf-file=.adoc-layout.conf
ASCIIDOC_MAN=a2x -f manpage
CPP=scripts/simplecpp
DEUTEX=deutex
@@ -75,7 +76,7 @@ $(FREEDOOM2): wadinfo_phase2.txt subdirs
$(DEUTEX) $(DEUTEX_ARGS) -iwad -build wadinfo_phase2.txt $@
%.html: %.adoc
- TZ=UTC $(ASCIIDOC) $<
+ $(ASCIIDOC) $(ADOCOPTS) $<
manual/freedoom-manual.pdf: manual/manual.adoc
$(MAKE) -C manual