diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4634351de41..c4e5be730c6 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -1046,7 +1046,7 @@ WaitEventSetWaitBlock(WaitEventSet *set, int cur_timeout,
 
 	/* Sleep */
 	rc = epoll_wait(set->epoll_fd, set->epoll_ret_events,
-					nevents, cur_timeout);
+					Min(nevents, set->nevents_space), cur_timeout);
 
 	/* Check return code */
 	if (rc < 0)