diff --git a/pageserver/src/tenant/mgr.rs b/pageserver/src/tenant/mgr.rs
index 818872c093..27f9d50c54 100644
--- a/pageserver/src/tenant/mgr.rs
+++ b/pageserver/src/tenant/mgr.rs
@@ -777,7 +777,7 @@ impl TenantManager {
         // then we do not need to set the slot to InProgress, we can just call into the
         // existng tenant.
         {
-            let locked = TENANTS.read().unwrap();
+            let locked = self.tenants.read().unwrap();
             let peek_slot = tenant_map_peek_slot(&locked, &tenant_id, TenantSlotPeekMode::Write)?;
             match (&new_location_config.mode, peek_slot) {
                 (LocationMode::Attached(attach_conf), Some(TenantSlot::Attached(tenant))) => {