diff --git a/src/runtime2/port.rs b/src/runtime2/port.rs
index ec1472dea11c434f063d786ca556f96293e9307d..a4503b7ca237a1a045c634fc4210715ef8d9cf61 100644
--- a/src/runtime2/port.rs
+++ b/src/runtime2/port.rs
@@ -21,7 +21,7 @@ impl PortIdLocal {
     }
 }
 
-#[derive(Eq, PartialEq)]
+#[derive(Debug, Eq, PartialEq)]
 pub enum PortKind {
     Putter,
     Getter,