diff --git a/Lake/Util/DRBMap.lean b/Lake/Util/DRBMap.lean
index 182f970417..21cf85e9e2 100644
--- a/Lake/Util/DRBMap.lean
+++ b/Lake/Util/DRBMap.lean
@@ -3,7 +3,7 @@ Copyright (c) 2022 Microsoft Corporation. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Leonardo de Moura, Mac Malone
 -/
-import Std.Data.RBMap
+import Bootstrap.Data.RBMap
 import Lake.Util.Compare
 
 namespace Lake