diff --git a/lib/gen_adv_conf.bash b/lib/gen_adv_conf.bash
index cbf0c0e..d546504 100644
--- a/lib/gen_adv_conf.bash
+++ b/lib/gen_adv_conf.bash
@@ -4,6 +4,7 @@ function gen_adv_conf
     cat > $out_file <<'EOT'
 [
     {riak_kv, [
+        {allow_strfun, true},
         {delete_mode, immediate},
         {test, true}
     ]},