diff --git a/lib/asyn-thread.c b/lib/asyn-thread.c
index a58e4b7904..32d496b107 100644
--- a/lib/asyn-thread.c
+++ b/lib/asyn-thread.c
@@ -195,9 +195,11 @@ void destroy_thread_sync_data(struct thread_sync_data *tsd)
    * close one end of the socket pair (may be done in resolver thread);
    * the other end (for reading) is always closed in the parent thread.
    */
+#ifndef USE_EVENTFD
   if(tsd->sock_pair[1] != CURL_SOCKET_BAD) {
     wakeup_close(tsd->sock_pair[1]);
   }
+#endif
 #endif
   memset(tsd, 0, sizeof(*tsd));
 }