diff --git a/Makefile b/Makefile
index fa504d0..c182ada 100644
--- a/Makefile
+++ b/Makefile
@@ -62,6 +62,8 @@ USER=simon@josefsson.org
 KEYID=2117364A
 
 $(PACKAGE)-$(VERSION).tgz: $(FILES)
+	git submodule init
+	git submodule update
 	mkdir $(PACKAGE)-$(VERSION) $(PACKAGE)-$(VERSION)/doc
 	cp $(CODE) $(MUNIN) $(PACKAGE)-$(VERSION)/
 	cp $(DOCS) $(PACKAGE)-$(VERSION)/doc/