diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 19b26f30c64c..f6fbfd128c1d 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -786,8 +786,9 @@ var (
 		Value: eth.DefaultConfig.Rollup.TxIngestionPollInterval,
 	}
 	TxIngestionSignerKeyHexFlag = cli.StringFlag{
-		Name:  "txingestion.signerkey",
-		Usage: "Hex private key to authenticate L1 to L2 txs",
+		Name:   "txingestion.signerkey",
+		Usage:  "Hex private key to authenticate L1 to L2 txs",
+		EnvVar: "TX_INGESTION_SIGNER_KEY",
 	}
 	TxIngestionSignerKeyFileFlag = cli.StringFlag{
 		Name:  "txingestion.signerkeyfile",