diff --git a/params/protocol_params.go b/params/protocol_params.go
index 669ed49c5..3ef1cf176 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -130,8 +130,9 @@ const (
 	ElasticityMultiplier     = 2          // Bounds the maximum gas limit an EIP-1559 block may have.
 	InitialBaseFee           = 1000000000 // Initial base fee for EIP-1559 blocks.
 
-	MaxCodeSize         = 24576                   // Maximum bytecode to permit for a contract
-	MaxCodeSizeShanghai = 32768                   // Maximum bytecode to permit for a contract after Shanghai
+	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract
+	// MaxCodeSizeShanghai = 32768                   // Maximum bytecode to permit for a contract after Shanghai
+	MaxCodeSizeShanghai = 24576                   // Maximum bytecode to permit for a contract after Shanghai
 	MaxInitCodeSize     = 2 * MaxCodeSizeShanghai // Maximum initcode to permit in a creation transaction and create instructions
 
 	// Precompiled contract gas prices