diff --git a/eth/ethconfig/gen_config.go b/eth/ethconfig/gen_config.go
index 2abddc9e0..aa67aaaae 100644
--- a/eth/ethconfig/gen_config.go
+++ b/eth/ethconfig/gen_config.go
@@ -56,6 +56,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
 		RPCTxFeeCap             float64
 		OverrideCancun          *uint64 `toml:",omitempty"`
 		OverrideVerkle          *uint64 `toml:",omitempty"`
+		BlobExtraReserve        uint64
 	}
 	var enc Config
 	enc.Genesis = c.Genesis
@@ -97,6 +98,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
 	enc.RPCTxFeeCap = c.RPCTxFeeCap
 	enc.OverrideCancun = c.OverrideCancun
 	enc.OverrideVerkle = c.OverrideVerkle
+	enc.BlobExtraReserve = c.BlobExtraReserve
 	return &enc, nil
 }
 
@@ -142,6 +144,7 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 		RPCTxFeeCap             *float64
 		OverrideCancun          *uint64 `toml:",omitempty"`
 		OverrideVerkle          *uint64 `toml:",omitempty"`
+		BlobExtraReserve        *uint64
 	}
 	var dec Config
 	if err := unmarshal(&dec); err != nil {
@@ -264,5 +267,8 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 	if dec.OverrideVerkle != nil {
 		c.OverrideVerkle = dec.OverrideVerkle
 	}
+	if dec.BlobExtraReserve != nil {
+		c.BlobExtraReserve = *dec.BlobExtraReserve
+	}
 	return nil
 }