diff --git a/ct/koffan.sh b/ct/koffan.sh
index c5905a332..910070c7f 100644
--- a/ct/koffan.sh
+++ b/ct/koffan.sh
@@ -12,6 +12,7 @@ var_ram="${var_ram:-1024}"
 var_disk="${var_disk:-4}"
 var_os="${var_os:-debian}"
 var_version="${var_version:-13}"
+var_arm64="${var_arm64:-yes}"
 var_arm64="${var_arm64:-no}"
 var_unprivileged="${var_unprivileged:-1}"