diff --git a/srcpkgs/libarchive/template b/srcpkgs/libarchive/template
index cf144685a3d..f8322847eb5 100644
--- a/srcpkgs/libarchive/template
+++ b/srcpkgs/libarchive/template
@@ -1,7 +1,7 @@
 # Template file for 'libarchive'
 pkgname=libarchive
 version=3.2.0
-revision=3
+revision=4
 bootstrap=yes
 build_style=gnu-configure
 configure_args="$(vopt_enable acl) $(vopt_enable acl xattr)
@@ -17,6 +17,9 @@ license="BSD"
 distfiles="http://www.libarchive.org/downloads/libarchive-${version}.tar.gz"
 checksum=7bce45fd71ff01dc20d19edd78322d4965583d81b8bed8e26cacb65d6f5baa87
 
+# XXX wtf, configure.ac does not set this!
+CFLAGS="-DHAVE_LZMA_STREAM_ENCODER_MT"
+
 if [ "$CROSS_BUILD" ]; then
 	hostmakedepends="automake libtool pkg-config"
 	pre_configure() {