diff --git a/sys/devel/m4/ympbuild b/sys/devel/m4/ympbuild
index bf4ef7bf..378c780c 100644
--- a/sys/devel/m4/ympbuild
+++ b/sys/devel/m4/ympbuild
@@ -7,7 +7,7 @@ description='GNU macro processor'
 email='kurth4cker@tutanota.com'
 maintainer='kurth4cker'
 license=('GPLv3')
-source=('https://ftp.gnu.org/gnu/m4/m4-1.4.19.tar.xz')
+source=("https://ftp.gnu.org/gnu/m4/m4-${version}.tar.xz")
 depends=( )
 makedepends=( )
 md5sums=('0d90823e1426f1da2fd872df0311298d')