1 files changed, 3 insertions, 2 deletions
diff --git a/ev_epoll.c b/ev_epoll.c
index a57e203..f8f9835 100644
--- a/ev_epoll.c
+++ b/ev_epoll.c
@@ -79,8 +79,9 @@ epoll_modify (EV_P_ int fd, int oev, int nev)
   oldmask = anfds [fd].emask;
   anfds [fd].emask = nev;
 
-  /* store the generation counter in the upper 32 bits */
-  ev.data.u64 = (uint64_t)(uint32_t)fd | ((uint64_t)(uint32_t)++anfds [fd].egen << 32);
+  /* store the generation counter in the upper 32 bits, the fd in the lower 32 bits */
+  ev.data.u64 = (uint64_t)(uint32_t)fd
+              | ((uint64_t)(uint32_t)++anfds [fd].egen << 32);
   ev.events   = (nev & EV_READ  ? EPOLLIN  : 0)
               | (nev & EV_WRITE ? EPOLLOUT : 0);