diff --git a/src/ion/mod.rs b/src/ion/mod.rs
index b764c7e..f3df24d 100644
--- a/src/ion/mod.rs
+++ b/src/ion/mod.rs
@@ -2872,7 +2872,7 @@ impl<'a, F: Function> Env<'a, F> {
         self.allocation_queue
             .insert(bundle, prio as usize, reg_hint);
         self.allocation_queue
-            .insert(new_bundle, new_prio as usize, PReg::invalid());
+            .insert(new_bundle, new_prio as usize, reg_hint);
     }
 
     fn compute_requirement(&self, bundle: LiveBundleIndex) -> Requirement {