diff --git a/src/runtime2/runtime.rs b/src/runtime2/runtime.rs
index 5e35dff82d1472beac90834a3438a579c455b7e5..ee19e6b5a17562f26a9d074195fb4bb18462b9d5 100644
--- a/src/runtime2/runtime.rs
+++ b/src/runtime2/runtime.rs
@@ -1062,7 +1062,7 @@ struct Context<'a> {
 }
 
 impl<'a> crate::protocol::RunContext for Context<'a> {
-    fn did_put(&mut self, port: PortId) -> bool {
+    fn did_put(&mut self, _port: PortId) -> bool {
         // Note that we want "did put" to return false if we have fired zero
         // times, because this implies we did a prevous
         let old_value = self.branch_ctx.just_called_did_put;