diff --git a/simgear/threads/SGThread.cxx b/simgear/threads/SGThread.cxx
index b4afc651..8e5c3a36 100644
--- a/simgear/threads/SGThread.cxx
+++ b/simgear/threads/SGThread.cxx
@@ -71,7 +71,7 @@ struct SGThread::PrivateData {
     {
         if (_handle == INVALID_HANDLE_VALUE)
             return;
-        DWORD ret = WaitForSingleObject(_handle, 0);
+        DWORD ret = WaitForSingleObject(_handle, INFINITE);
         if (ret != WAIT_OBJECT_0)
             return;
         CloseHandle(_handle);