diff --git a/Ports/libexpat/package.sh b/Ports/libexpat/package.sh
index f8e55f9f7d8..e06bf79ac2f 100755
--- a/Ports/libexpat/package.sh
+++ b/Ports/libexpat/package.sh
@@ -3,6 +3,7 @@ port=libexpat
 version=2.2.9
 useconfigure=true
 use_fresh_config_sub=true
+config_sub_path=conftools/config.sub
 files="https://github.com/libexpat/libexpat/releases/download/R_2_2_9/expat-${version}.tar.xz expat-${version}.tar.xz
 https://github.com/libexpat/libexpat/releases/download/R_2_2_9/expat-${version}.tar.xz.asc expat-${version}.tar.xz.asc"
 workdir=expat-${version}