diff --git a/src/ports.rs b/src/ports.rs
index cbfc5a0..25185b8 100644
--- a/src/ports.rs
+++ b/src/ports.rs
@@ -46,8 +46,8 @@ pub struct PortHandler {
 
     pub port_state: HashMap<Port, PortState>,
 
-    #[serde(skip)]
     #[cfg(feature = "debug_server")]
+    #[serde(default)]
     pub names: HashMap<Number, String>,
 }