diff --git a/cli/main.go b/cli/main.go
index eaaa5b29..b02b5677 100644
--- a/cli/main.go
+++ b/cli/main.go
@@ -158,7 +158,7 @@ func setupGenesis(cmd *cli.Command) (string, uint64) {
 	)
 
 	switch {
-	case cmd.Bool(customGenesisForkFlag.Name):
+	case cmd.IsSet(customGenesisForkFlag.Name):
 		genesisForkVersion = cmd.String(customGenesisForkFlag.Name)
 	case cmd.Bool(sepoliaFlag.Name):
 		genesisForkVersion = genesisForkVersionSepolia