diff --git a/src/unix/linux.c b/src/unix/linux.c
index b1c3c681867917cd5330786ac339fac63a2401c5..75148764c61afa213cf36a3f97ccda686eed9b56 100644
--- a/src/unix/linux.c
+++ b/src/unix/linux.c
@@ -1546,6 +1546,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
          * Ignore all errors because we may be racing with another thread
          * when the file descriptor is closed.
          */
+        UV_LOGF("fd %{public}d don't belong to loop %{public}zu", fd, (size_t)loop);
         uv__epoll_ctl_prep(epollfd, ctl, &prep, EPOLL_CTL_DEL, fd, pe);
         continue;
       }