diff --git a/eth/ethconfig/gen_config.go b/eth/ethconfig/gen_config.go
index b8b9eee294..147a559984 100644
--- a/eth/ethconfig/gen_config.go
+++ b/eth/ethconfig/gen_config.go
@@ -50,6 +50,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
 		BlobPool                blobpool.Config
 		GPO                     gasprice.Config
 		EnablePreimageRecording bool
+		EnableWitnessCollection bool `toml:"-"`
 		VMTrace                 string
 		VMTraceJsonConfig       string
 		DocRoot                 string `toml:"-"`
@@ -93,6 +94,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
 	enc.BlobPool = c.BlobPool
 	enc.GPO = c.GPO
 	enc.EnablePreimageRecording = c.EnablePreimageRecording
+	enc.EnableWitnessCollection = c.EnableWitnessCollection
 	enc.VMTrace = c.VMTrace
 	enc.VMTraceJsonConfig = c.VMTraceJsonConfig
 	enc.DocRoot = c.DocRoot
@@ -140,6 +142,7 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 		BlobPool                *blobpool.Config
 		GPO                     *gasprice.Config
 		EnablePreimageRecording *bool
+		EnableWitnessCollection *bool `toml:"-"`
 		VMTrace                 *string
 		VMTraceJsonConfig       *string
 		DocRoot                 *string `toml:"-"`
@@ -252,6 +255,9 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 	if dec.EnablePreimageRecording != nil {
 		c.EnablePreimageRecording = *dec.EnablePreimageRecording
 	}
+	if dec.EnableWitnessCollection != nil {
+		c.EnableWitnessCollection = *dec.EnableWitnessCollection
+	}
 	if dec.VMTrace != nil {
 		c.VMTrace = *dec.VMTrace
 	}