diff --git a/rust/ares/src/interpreter.rs b/rust/ares/src/interpreter.rs
index 88b4118..62f88da 100644
--- a/rust/ares/src/interpreter.rs
+++ b/rust/ares/src/interpreter.rs
@@ -418,26 +418,6 @@ pub fn interpret(context: &mut Context, mut subject: Noun, formula: Noun) -> Res
                             push_formula(&mut context.stack, vale.formula, false)?;
                         }
                         Todo2::ComputeResult => {
-                            if !cfg!(feature = "sham_hints") {
-                                if let Some(jet) = context.warm.find_jet(
-                                    &mut context.stack,
-                                    &mut vale.subject,
-                                    &mut res,
-                                ) {
-                                    match jet(context, vale.subject) {
-                                        Ok(jet_res) => {
-                                            res = jet_res;
-                                            context.stack.pop::<NockWork>();
-                                            continue;
-                                        }
-                                        Err(JetErr::Punt) => {}
-                                        Err(err) => {
-                                            break Err(err.into());
-                                        }
-                                    }
-                                }
-                            };
-
                             let stack = &mut context.stack;
                             if vale.tail {
                                 stack.pop::<NockWork>();
diff --git a/rust/ares/src/serf.rs b/rust/ares/src/serf.rs
index 319813b..35a1bab 100644
--- a/rust/ares/src/serf.rs
+++ b/rust/ares/src/serf.rs
@@ -270,6 +270,7 @@ pub fn serf() -> io::Result<()> {
         //  XX: Such data should go in the PMA once that's available
         unsafe {
             let stack = &mut context.nock_context.stack;
+            stack.preserve(&mut context.arvo);
             stack.preserve(&mut context.nock_context.cold);
             stack.preserve(&mut context.nock_context.warm);
             stack.frame_pop();