diff --git a/conf/templates/debian_repo/freight.conf b/conf/templates/debian_repo/freight.conf
index 40b731f..bb9c926 100644
--- a/conf/templates/debian_repo/freight.conf
+++ b/conf/templates/debian_repo/freight.conf
@@ -9,6 +9,9 @@ VARCACHE="{{freight_cache_path}}"
 ORIGIN="apt.peachcloud.org"
 LABEL="PeachCloud"
 
+# Architectures supported by the package repository.
+ARCHS="arm64"
+
 # Cache the control files after each run (on), or regenerate them every
 # time (off).
 CACHE="off"