diff --git a/sys-apps/groff/groff-1.20.1.bep b/sys-apps/groff/groff-1.20.1.bep
index 663be5bcc..fb330f71b 100644
--- a/sys-apps/groff/groff-1.20.1.bep
+++ b/sys-apps/groff/groff-1.20.1.bep
@@ -8,7 +8,7 @@ DEPEND=""
 BUILD {
 	cd groff-1.20.1
 	libtoolize --force --copy --install
-	aclocal
+	aclocal -I m4
 	autoconf
 	COMMON_DOCS=`finddir B_COMMON_DOCUMENTATION_DIRECTORY`
 	sed -i 's/docdir=$(datadir)\/doc\/groff\//docdir=`finddir B_COMMON_DOCUMENTATION_DIRECTORY`\/doc\/groff/g' Ma*