diff --git a/util/aio-posix.c b/util/aio-posix.c
index 1427f49b4a..d8f0cb4af8 100644
--- a/util/aio-posix.c
+++ b/util/aio-posix.c
@@ -119,7 +119,7 @@ static int aio_epoll(AioContext *ctx, GPollFD *pfds,
     }
     if (timeout <= 0 || ret > 0) {
         ret = epoll_wait(ctx->epollfd, events,
-                         sizeof(events) / sizeof(events[0]),
+                         ARRAY_SIZE(events),
                          timeout);
         if (ret <= 0) {
             goto out;