diff --git a/lib/posix/epoll.nim b/lib/posix/epoll.nim
index 2d38137bb9ac4..2236bb16b9c8e 100644
--- a/lib/posix/epoll.nim
+++ b/lib/posix/epoll.nim
@@ -23,6 +23,7 @@ const
   EPOLLWRBAND* = 0x00000200
   EPOLLMSG* = 0x00000400
   EPOLLRDHUP* = 0x00002000
+  EPOLLEXCLUSIVE* = 1 shl 28
   EPOLLWAKEUP* = 1 shl 29
   EPOLLONESHOT* = 1 shl 30
   EPOLLET* = 1 shl 31