diff --git a/quic/qbone/qbone_packet_processor.cc b/quic/qbone/qbone_packet_processor.cc
index 7b45ed1..6e83e76 100644
--- a/quic/qbone/qbone_packet_processor.cc
+++ b/quic/qbone/qbone_packet_processor.cc
@@ -103,6 +103,10 @@
       SendTcpReset(*packet, direction);
       stats_->OnPacketDroppedWithTcpReset(direction);
       break;
+    case ProcessingResult::TCP_RESET:
+      SendTcpReset(*packet, direction);
+      stats_->OnPacketDroppedWithTcpReset(direction);
+      break;
   }
 }
 
diff --git a/quic/qbone/qbone_packet_processor.h b/quic/qbone/qbone_packet_processor.h
index c85280f..8c2375a 100644
--- a/quic/qbone/qbone_packet_processor.h
+++ b/quic/qbone/qbone_packet_processor.h
@@ -46,6 +46,8 @@
     // RST requires information from the current connection state to be
     // well-formed.
     ICMP_AND_TCP_RESET = 4,
+    // Send a TCP RST.
+    TCP_RESET = 5,
   };
 
   class OutputInterface {