diff --git a/src/haproxy.c b/src/haproxy.c
index 317acebbb..b7979ea4e 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -2162,6 +2162,9 @@ static void init(int argc, char **argv)
 	global.hardmaxconn = global.maxconn;  /* keep this max value */
 	global.maxsock += global.maxconn * 2; /* each connection needs two sockets */
 	global.maxsock += global.maxpipes * 2; /* each pipe needs two FDs */
+	global.maxsock += global.nbthread;     /* one epoll_fd/kqueue_fd per thread */
+	global.maxsock += 2 * global.nbthread; /* one wake-up pipe (2 fd) per thread */
+
 	/* compute fd used by async engines */
 	if (global.ssl_used_async_engines) {
 		int sides = !!global.ssl_used_frontend + !!global.ssl_used_backend;