diff --git a/src/proto_alpha/lib_delegate/baking_simulator.ml b/src/proto_alpha/lib_delegate/baking_simulator.ml
index 76b8c3a6b18525d8cfc8b68c89388d33038cb931..8188f673c1236843d47da4e88ae1a50983ae7430 100644
--- a/src/proto_alpha/lib_delegate/baking_simulator.ml
+++ b/src/proto_alpha/lib_delegate/baking_simulator.ml
@@ -107,7 +107,7 @@ let begin_construction ~timestamp ?protocol_data
         ~predecessor:pred_hash
         ?protocol_data
         ~timestamp
-        ~cache:`Load
+        ~cache:`Lazy
         ()
       >>=? fun state ->
       return {predecessor; context; state; rev_operations = []; header}