1 files changed, 1 insertions, 1 deletions
diff --git a/ev_epoll.c b/ev_epoll.c
index a324691..c738fd0 100644
--- a/ev_epoll.c
+++ b/ev_epoll.c
@@ -90,7 +90,7 @@ epoll_modify (EV_P_ int fd, int oev, int nev)
   ev.events   = (nev & EV_READ  ? EPOLLIN  : 0)
               | (nev & EV_WRITE ? EPOLLOUT : 0);
 
-  if (expect_true (!epoll_ctl (backend_fd, oev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD, fd, &ev)))
+  if (expect_true (!epoll_ctl (backend_fd, oev && oldmask != nev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD, fd, &ev)))
     return;
 
   if (expect_true (errno == ENOENT))