diff -r bef78732195b -r 775168282b2f components/m4/Makefile
--- a/components/m4/Makefile	Fri Dec 02 16:56:03 2011 -0800
+++ b/components/m4/Makefile	Mon Dec 05 11:48:52 2011 -0800
@@ -27,6 +27,7 @@
 
 COMPONENT_NAME=		m4
 COMPONENT_VERSION=	1.4.12
+COMPONENT_PROJECT_URL=	http://www.gnu.org/software/m4/
 COMPONENT_SRC=		$(COMPONENT_NAME)-$(COMPONENT_VERSION)
 COMPONENT_ARCHIVE=	$(COMPONENT_SRC).tar.gz
 COMPONENT_ARCHIVE_HASH=	sha1:013ca38511e17835dc1a1381cbe8e39179637a49