diff --git a/host/RendererImpl.cpp b/host/RendererImpl.cpp
index 9e8ec87..cf45efa 100644
--- a/host/RendererImpl.cpp
+++ b/host/RendererImpl.cpp
@@ -88,6 +88,7 @@
 
     void stop() {
         mCleanupWorker.enqueue(Exit{});
+        mCleanupWorker.join();
     }
 
     void waitForCleanup() {