diff --git a/src/runtime2/component/component_context.rs b/src/runtime2/component/component_context.rs
index 9aab35cfd66f36787b4f538ce99d455de7475cee..94dff5badfa7677ddbe3d4b2425ddff7366afc0a 100644
--- a/src/runtime2/component/component_context.rs
+++ b/src/runtime2/component/component_context.rs
@@ -39,6 +39,7 @@ pub enum PortStateFlag {
     BlockedDueToPeerChange = 0x02, // busy changing peers, hence use of port is temporarily blocked
     BlockedDueToFullBuffers = 0x04,
     Transmitted = 0x08, // Transmitted, so cannot be used anymore
+    Received = 0x10, // Received, so cannot be used yet, only after the sync round
 }
 
 #[derive(Copy, Clone)]
@@ -62,7 +63,8 @@ impl PortState {
     pub fn can_send(&self) -> bool {
         return
             !self.is_set(PortStateFlag::Closed) &&
-            !self.is_set(PortStateFlag::Transmitted);
+            !self.is_set(PortStateFlag::Transmitted) &&
+            !self.is_set(PortStateFlag::Received);
     }
 
     #[inline]
@@ -102,7 +104,8 @@ impl Debug for PortState {
         for (flag_name, flag_value) in &[
             ("closed", Closed),
             ("blocked_peer_change", BlockedDueToPeerChange),
-            ("blocked_full_buffers", BlockedDueToFullBuffers)
+            ("blocked_full_buffers", BlockedDueToFullBuffers),
+            ("transmitted", Transmitted),
         ] {
             s.field(flag_name, &self.is_set(*flag_value));
         }