diff --git a/Ports/libarchive/package.sh b/Ports/libarchive/package.sh
index 21cbb84136..bff940dff8 100755
--- a/Ports/libarchive/package.sh
+++ b/Ports/libarchive/package.sh
@@ -3,6 +3,7 @@ port=libarchive
 version=3.5.2
 useconfigure=true
 use_fresh_config_sub=true
+config_sub_path=build/autoconf/config.sub
 configopts=("--without-xml2")
 files="https://libarchive.org/downloads/libarchive-${version}.tar.gz libarchive-${version}.tar.gz
 https://libarchive.org/downloads/libarchive-${version}.tar.gz.asc libarchive-${version}.tar.gz.asc"