diff --git a/lcli/src/eth1_genesis.rs b/lcli/src/eth1_genesis.rs
index 51081b8847..4b06d2c11b 100644
--- a/lcli/src/eth1_genesis.rs
+++ b/lcli/src/eth1_genesis.rs
@@ -28,7 +28,7 @@ pub fn run<T: EthSpec>(mut env: Environment<T>, matches: &ArgMatches) -> Result<
     let mut eth2_testnet_config: Eth2TestnetConfig<T> =
         Eth2TestnetConfig::load(testnet_dir.clone())?;
 
-    let mut spec = eth2_testnet_config
+    let spec = eth2_testnet_config
         .yaml_config
         .as_ref()
         .ok_or_else(|| "The testnet directory must contain a spec config".to_string())?
@@ -40,8 +40,6 @@ pub fn run<T: EthSpec>(mut env: Environment<T>, matches: &ArgMatches) -> Result<
             )
         })?;
 
-    spec.genesis_fork_version = [1, 3, 3, 7];
-
     let mut config = Eth1Config::default();
     config.endpoint = endpoint.to_string();
     config.deposit_contract_address = eth2_testnet_config.deposit_contract_address.clone();
diff --git a/lcli/src/main.rs b/lcli/src/main.rs
index aad659db33..9fb994207a 100644
--- a/lcli/src/main.rs
+++ b/lcli/src/main.rs
@@ -33,6 +33,7 @@ fn main() {
         .arg(
             Arg::with_name("spec")
                 .short("s")
+                .long("spec")
                 .value_name("STRING")
                 .takes_value(true)
                 .required(true)