diff --git a/src/hydra-queue-runner/hydra-queue-runner.cc b/src/hydra-queue-runner/hydra-queue-runner.cc
index 43c865e2..1f3380f4 100644
--- a/src/hydra-queue-runner/hydra-queue-runner.cc
+++ b/src/hydra-queue-runner/hydra-queue-runner.cc
@@ -96,6 +96,8 @@ void State::loadMachinesFile()
 
     auto machines_(machines.lock());
     *machines_ = newMachines;
+
+    wakeDispatcher();
 }