diff --git a/src/viewer/OsgViewer.cpp b/src/viewer/OsgViewer.cpp
index 2a8b5f94..165c0656 100644
--- a/src/viewer/OsgViewer.cpp
+++ b/src/viewer/OsgViewer.cpp
@@ -21,7 +21,7 @@ OsgViewer::OsgViewer(QObject* parent) noexcept
     LOG_INFO("actor, self={}", fmt::ptr(this));
     compositeViewer_->setKeyEventSetsDone(0);
     osgEarth::initialize();
-    //compositeViewer_->setThreadingModel(osgViewer::ViewerBase::ThreadingModel::SingleThreaded);
+    compositeViewer_->setThreadingModel(osgViewer::ViewerBase::ThreadingModel::SingleThreaded);
 
 }