diff --git a/tdactor/td/actor/ConcurrentScheduler.cpp b/tdactor/td/actor/ConcurrentScheduler.cpp
index 4c41d92bd..e6b45aec2 100644
--- a/tdactor/td/actor/ConcurrentScheduler.cpp
+++ b/tdactor/td/actor/ConcurrentScheduler.cpp
@@ -138,10 +138,12 @@ void ConcurrentScheduler::finish() {
 #endif
 
   if (ExitGuard::is_exited()) {
+#if !TD_THREAD_UNSUPPORTED && !TD_EVENTFD_UNSUPPORTED
     // prevent closing of schedulers from already killed by OS threads
     for (auto &thread : threads_) {
       thread.detach();
     }
+#endif
 
 #if TD_PORT_WINDOWS
     iocp_->interrupt_loop();