diff --git a/src/server.rs b/src/server.rs
index 49eb300..b607fe3 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -221,7 +221,7 @@ impl Server {
                 worker_options.block_size,
                 worker_options.timeout,
                 worker_options.window_size,
-                self.duplicate_packets,
+                self.duplicate_packets + 1,
             );
             worker.receive()
         };