diff --git a/src/Lean/Meta/TransparencyMode.lean b/src/Lean/Meta/TransparencyMode.lean
index 44ebf8acaa..4d07fc9ddb 100644
--- a/src/Lean/Meta/TransparencyMode.lean
+++ b/src/Lean/Meta/TransparencyMode.lean
@@ -7,7 +7,7 @@ namespace Lean.Meta
 
 inductive TransparencyMode where
   | all | default | reducible | instances
-  deriving Inhabited, BEq
+  deriving Inhabited, BEq, Repr
 
 namespace TransparencyMode