diff --git a/foyer-memory/src/inflight.rs b/foyer-memory/src/inflight.rs
index d64f4308..a97cca31 100644
--- a/foyer-memory/src/inflight.rs
+++ b/foyer-memory/src/inflight.rs
@@ -156,18 +156,6 @@ where
     next_id: usize,
 }
 
-impl<E, S, I> Default for InflightManager<E, S, I>
-where
-    E: Eviction,
-    E::Key: Key,
-    S: HashBuilder,
-    I: Indexer<Eviction = E>,
-{
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
 impl<E, S, I> InflightManager<E, S, I>
 where
     E: Eviction,