# must fail: receipts_walk_bound receipts_walk_65
# the parent walk past its bound (receipts::admit_walking)
diff --git a/wai/wai-rs/src/http_binding/receipts.rs b/wai/wai-rs/src/http_binding/receipts.rs
index f2bdba57..7d4eb0a9 100644
--- a/wai/wai-rs/src/http_binding/receipts.rs
+++ b/wai/wai-rs/src/http_binding/receipts.rs
@@ -418,7 +418,7 @@ fn admit_walking(
     loop {
         // §3 step 3 says `parent_not_held` only of a group that names a parent.
         let Some(l) = link else { return Err(stop(fetched, "parent_not_held")) };
-        if fetched == bound {
+        if fetched == usize::MAX - bound {
             return Err(stop(fetched, "bound"));
         }
         let bytes = match fetch.get(&l) {