diff --git a/src/libstore/worker-protocol-connection.cc b/src/libstore/worker-protocol-connection.cc
index 072bae8da..3a640051e 100644
--- a/src/libstore/worker-protocol-connection.cc
+++ b/src/libstore/worker-protocol-connection.cc
@@ -152,7 +152,6 @@ WorkerProto::BasicClientConnection::handshake(BufferedSink & to, Source & from,
         throw Error("Nix daemon protocol version not supported");
     if (GET_PROTOCOL_MINOR(daemonVersion) < 10)
         throw Error("the Nix daemon version is too old");
-    to << localVersion;
 
     return std::min(daemonVersion, localVersion);
 }