diff --git a/ethergo/backends/geth/config.go b/ethergo/backends/geth/config.go
index f4e242e0f1..e0c570170a 100644
--- a/ethergo/backends/geth/config.go
+++ b/ethergo/backends/geth/config.go
@@ -47,6 +47,10 @@ func makeEthConfig(address common.Address, config *params.ChainConfig) *ethconfi
 	ethConfig := ethconfig.Defaults
 	ethConfig.NetworkId = config.ChainID.Uint64()
 	ethConfig.Genesis = core.DeveloperGenesisBlock(10000000, address)
+	ethConfig.Genesis.ExtraData = append([]byte{}, make([]byte, 32)...)                    // 32 bytes of vanity
+	ethConfig.Genesis.ExtraData = append(ethConfig.Genesis.ExtraData, address.Bytes()...)  // Signer address
+	ethConfig.Genesis.ExtraData = append(ethConfig.Genesis.ExtraData, make([]byte, 65)...) // 65 bytes of signature
+
 	ethConfig.Genesis.Config = config
 	ethConfig.Miner.Etherbase = address
 	ethConfig.SyncMode = downloader.FullSync