diff --git a/pageserver/src/tenant/timeline.rs b/pageserver/src/tenant/timeline.rs
index e5e137364c..59ce0cdb91 100644
--- a/pageserver/src/tenant/timeline.rs
+++ b/pageserver/src/tenant/timeline.rs
@@ -1790,7 +1790,9 @@ impl Timeline {
                 generation,
                 shard_identity,
                 pg_version,
-                layers: Arc::new(RwLock::new(LayerManager::new(Arc::clone(&tenant_conf)))),
+                layers: Arc::new(tokio::sync::RwLock::new(LayerManager::new(Arc::clone(
+                    &tenant_conf,
+                )))),
 
                 walredo_mgr,
                 walreceiver: Mutex::new(None),