diff --git a/src/runtime2/messages.rs b/src/runtime2/messages.rs
index c2cde8548f2bd93cf5fa8058a1c975851d2ba318..191b5ebb98e9f84142b405cec1ae18d2c3f88615 100644
--- a/src/runtime2/messages.rs
+++ b/src/runtime2/messages.rs
@@ -50,7 +50,7 @@ impl ConnectorInbox {
         // If it is the first message on the port, then we cannot possible have
         // a previous port mapping on that port.
         let port_action = PortAction{
-            port_id: message.sending_port.0.u32_suffix,
+            port_id: message.receiving_port.0.u32_suffix,
             prev_branch_id: message.peer_prev_branch_id,
         };