diff --git a/eth/tracers/native/prestate.go b/eth/tracers/native/prestate.go
index c072bf755f..b3d3bb7b96 100644
--- a/eth/tracers/native/prestate.go
+++ b/eth/tracers/native/prestate.go
@@ -45,6 +45,8 @@ type stateMap = map[common.Address]*account
 
 type account struct {
 	Balance  *big.Int                    `json:"balance,omitempty"`
+	// Pointer so omitempty can omit unchanged code (nil) while still
+	// emitting "0x" when code is cleared (e.g. EIP-7702 deauthorization).
 	Code     *[]byte                     `json:"code,omitempty"`
 	CodeHash *common.Hash                `json:"codeHash,omitempty"`
 	Nonce    uint64                      `json:"nonce,omitempty"`