diff --git a/cmd/evm/internal/t8ntool/flags.go b/cmd/evm/internal/t8ntool/flags.go
index e968ee6d9533..de19dbc851ef 100644
--- a/cmd/evm/internal/t8ntool/flags.go
+++ b/cmd/evm/internal/t8ntool/flags.go
@@ -125,11 +125,6 @@ var (
 		Name:  "seal.clique",
 		Usage: "Seal block with Clique. `stdin` or file name of where to find the Clique sealing data.",
 	}
-	SealEthashModeFlag = &cli.StringFlag{
-		Name:  "seal.ethash.mode",
-		Usage: "Defines the type and amount of PoW verification an ethash engine makes.",
-		Value: "normal",
-	}
 	RewardFlag = &cli.Int64Flag{
 		Name:  "state.reward",
 		Usage: "Mining reward. Set to -1 to disable",
diff --git a/cmd/evm/main.go b/cmd/evm/main.go
index 143b069671d8..024be62b9c54 100644
--- a/cmd/evm/main.go
+++ b/cmd/evm/main.go
@@ -179,7 +179,6 @@ var blockBuilderCommand = &cli.Command{
 		t8ntool.InputWithdrawalsFlag,
 		t8ntool.InputTxsRlpFlag,
 		t8ntool.SealCliqueFlag,
-		t8ntool.SealEthashModeFlag,
 		t8ntool.VerbosityFlag,
 	},
 }