diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index 57a5f0df..21a6c331 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -234,7 +234,7 @@ void State::buildRemote(ref<Store> destStore,
         unsigned int remoteVersion;
 
         try {
-            to << SERVE_MAGIC_1 << 0x204;
+            to << SERVE_MAGIC_1 << 0x206;
             to.flush();
 
             unsigned int magic = readInt(from);