1 files changed, 2 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index fda0fe0..23a6233 100644
--- a/Makefile
+++ b/Makefile
@@ -46,8 +46,10 @@ html: $(HTML_FILES)
 $(HTML_ROOTDIR)/%.html: ./doc/%.md $(HTML_TEMPLATE)
 	mtime="$$(git --no-pager log -1 --pretty="format:%ct" -- "$<" 2>/dev/null)"; \
 	[ -n "$$mtime" ] || mtime="$$(date +%s -r "$<")"; \
+	[ "$<" = "doc/index.md" ] && parent="" || parent="./index.html"; \
 	pandoc -sp -f markdown -t html+smart --css=$(CSS) --template=$(HTML_TEMPLATE) \
 		--variable=date:"$$(LC_TIME=C date +"Last modified on %a, %d %b %Y at %T %z" -d @"$$mtime")" \
+		--variable=parent:"$$parent" \
 		--output="$@" -- "$<"
 
 doc: manual html