diff --git a/src/config.rs b/src/config.rs
index facf6cfb..183aa572 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -55,6 +55,8 @@ pub struct RosenpassPeer {
 pub struct WireGuard {
     pub device: String,
     pub peer: String,
+
+    #[serde(default)]
     pub extra_params: Vec<String>,
 }