diff --git a/Makefile b/Makefile
index b43a641..be965ae 100644
--- a/Makefile
+++ b/Makefile
@@ -57,9 +57,6 @@ release: build/pugixml-$(VERSION).tar.gz build/pugixml-$(VERSION).zip
 
 docs: docs/quickstart.html docs/manual.html
 
-docs/%.html: docs/%.adoc
-	asciidoctor -b html5 $< -o $@
-
 build/pugixml-%: .FORCE | $(RELEASE)
 	perl tests/archive.pl $@ $|
 
@@ -72,4 +69,8 @@ $(BUILD)/%.o: %
 
 -include $(OBJECTS:.o=.d)
 
+.SECONDEXPANSION:
+docs/%.html: docs/%.adoc $$(shell sed -n 's/include\:\:\(.*\)\[.*/docs\/\1/p' docs/%.adoc)
+	asciidoctor -b html5 $< -o $@
+
 .PHONY: all test clean release .FORCE