diff --git a/src/runtime2/component/control_layer.rs b/src/runtime2/component/control_layer.rs
index ccce27eca977256b682599edd1db0dc6e7946604..9eabc0cd5f0534f877c7251c46b1296ac11bfbf4 100644
--- a/src/runtime2/component/control_layer.rs
+++ b/src/runtime2/component/control_layer.rs
@@ -5,7 +5,7 @@ use crate::runtime2::component::*;
 use super::component_context::*;
 
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
-pub(crate) struct ControlId(u32);
+pub(crate) struct ControlId(pub(crate) u32);
 
 impl ControlId {
     /// Like other invalid IDs, this one doesn't care any significance, but is
@@ -162,7 +162,7 @@ impl ControlLayer {
         let entry_id = self.take_id();
         self.entries.push(ControlEntry{
             id: entry_id,
-            ack_countdown: 1, // incremented by calls to `add_reroute_entry`
+            ack_countdown: 0, // incremented by calls to `add_reroute_entry`
             content: ControlContent::UnblockPutWithPorts,
         });