diff --git a/zebra-network/src/config.rs b/zebra-network/src/config.rs
index c2a1501a1..343aead71 100644
--- a/zebra-network/src/config.rs
+++ b/zebra-network/src/config.rs
@@ -675,8 +675,8 @@ impl<'de> Deserialize<'de> for Config {
             network: network_kind,
             testnet_parameters,
             regtest_nu5_activation_height,
-            mut initial_mainnet_peers,
-            mut initial_testnet_peers,
+            initial_mainnet_peers,
+            initial_testnet_peers,
             cache_dir,
             peerset_initial_target_size,
             crawl_new_peer_interval,
@@ -703,11 +703,7 @@ impl<'de> Deserialize<'de> for Config {
         let network = match (network_kind, testnet_parameters) {
             (NetworkKind::Mainnet, _) => Network::Mainnet,
             (NetworkKind::Testnet, None) => Network::new_default_testnet(),
-            (NetworkKind::Regtest, _) => {
-                initial_mainnet_peers = Default::default();
-                initial_testnet_peers = Default::default();
-                Network::new_regtest(regtest_nu5_activation_height)
-            }
+            (NetworkKind::Regtest, _) => Network::new_regtest(regtest_nu5_activation_height),
             (
                 NetworkKind::Testnet,
                 Some(DTestnetParameters {