--- fvwm-3.9999/doc/Makefile.am.old	2022-01-20 17:51:23.270986836 +0100
+++ fvwm-3.9999/doc/Makefile.am	2022-01-20 17:57:30.239002663 +0100
@@ -19,6 +19,7 @@
 
 if FVWM_BUILD_MANDOC
 man1_MANS = $(patsubst %.adoc,%.1, $(MODULE_ADOC))
+html_MANS = $(patsubst %.adoc,%.html, $(MODULE_ADOC))
 EXTRACT_SECTIONS = \
 	commands \
 	menus \
@@ -29,6 +30,10 @@
 docs: $(man1_MANS)
 $(man1_MANS): $(SECTION_FILES)
 
+html: htmls
+htmls: $(html_MANS)
+$(html_MANS): $(SECTION_FILES)
+
 %.ad: fvwm3_manpage_source.adoc
 	SECTION=$(patsubst fvwm3_%.ad,%,$@); \
 	cat "$<" | \
@@ -38,4 +43,7 @@
 
 %.1: %.adoc
 	"$(ASCIIDOC)" -b manpage -a "$(patsubst %.1,%,$@)" "$<" -o "$@"
+
+%.html: %.adoc
+	"$(ASCIIDOC)" -b html5 -a "$(patsubst %.html,%,$@)" "$<" -o "$@"
 endif