diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index 6bbd22e2..46c94e60 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -11,6 +11,7 @@
 #include "state.hh"
 #include "util.hh"
 #include "worker-protocol.hh"
+#include "worker-protocol-impl.hh"
 #include "finally.hh"
 #include "url.hh"