diff --git a/lldb/source/Host/windows/MainLoopWindows.cpp b/lldb/source/Host/windows/MainLoopWindows.cpp
index c0b10797e506a..9b7df10258bcd 100644
--- a/lldb/source/Host/windows/MainLoopWindows.cpp
+++ b/lldb/source/Host/windows/MainLoopWindows.cpp
@@ -55,11 +55,7 @@ class PipeEvent : public MainLoopWindows::IOEvent {
     if (m_monitor_thread.joinable()) {
       m_stopped = true;
       SetEvent(m_ready);
-      // Keep trying to cancel ReadFile() until the thread exits.
-      do {
-        CancelIoEx(m_handle, /*lpOverlapped=*/NULL);
-      } while (WaitForSingleObject(m_monitor_thread.native_handle(), 1) ==
-               WAIT_TIMEOUT);
+      CancelIoEx(m_handle, /*lpOverlapped=*/NULL);
       m_monitor_thread.join();
     }
     CloseHandle(m_event);