diff --git a/simgear/scene/tsync/terrasync.cxx b/simgear/scene/tsync/terrasync.cxx
index 3f44070d..1ecb8a8f 100644
--- a/simgear/scene/tsync/terrasync.cxx
+++ b/simgear/scene/tsync/terrasync.cxx
@@ -1346,6 +1346,7 @@ void SGTerraSync::update(double)
         _workerThread->setHTTPServer("https://data.kongjian.xin/fgscenery","https://data.kongjian.xin/osm2city");
         //end
 
+        enabled = false;
 
         _workerThread->stop();