4 files changed, 5 insertions, 5 deletions
diff --git a/ext/socket/ipsocket.c b/ext/socket/ipsocket.c
index 9d713d0afd..bc93140d68 100644
--- a/ext/socket/ipsocket.c
+++ b/ext/socket/ipsocket.c
@@ -105,7 +105,7 @@ init_inetsock_internal(struct inetsock_arg *arg)
     arg->fd = -1;
 
     if (type == INET_SERVER) {
-	status = listen(fd, 5);
+	status = listen(fd, SOMAXCONN);
 	if (status < 0) {
 	    close(fd);
             rb_sys_fail("listen(2)");
diff --git a/ext/socket/lib/socket.rb b/ext/socket/lib/socket.rb
index 34a4379336..d5201ef788 100644
--- a/ext/socket/lib/socket.rb
+++ b/ext/socket/lib/socket.rb
@@ -182,7 +182,7 @@ class Addrinfo
   end
 
   # creates a listening socket bound to self.
-  def listen(backlog=5)
+  def listen(backlog=Socket::SOMAXCONN)
     sock = Socket.new(self.pfamily, self.socktype, self.protocol)
     begin
       sock.ipv6only! if self.ipv6?
@@ -386,7 +386,7 @@ class Socket < BasicSocket
     ai_list = Addrinfo.getaddrinfo(host, 0, nil, :STREAM, nil, Socket::AI_PASSIVE)
     sockets = ip_sockets_port0(ai_list, true)
     sockets.each {|s|
-      s.listen(5)
+      s.listen(Socket::SOMAXCONN)
     }
     sockets
   ensure
diff --git a/ext/socket/mkconstants.rb b/ext/socket/mkconstants.rb
index 124a094946..613850777d 100644
--- a/ext/socket/mkconstants.rb
+++ b/ext/socket/mkconstants.rb
@@ -688,7 +688,7 @@ INET6_ADDRSTRLEN	46	Maximum length of an IPv6 address string
 IFNAMSIZ	nil	Maximum interface name size
 IF_NAMESIZE	nil	Maximum interface name size
 
-SOMAXCONN	nil	Maximum connection requests that may be queued for a socket
+SOMAXCONN	5	Maximum connection requests that may be queued for a socket
 
 SCM_RIGHTS	nil	Access rights
 SCM_TIMESTAMP	nil	Timestamp (timeval)
diff --git a/ext/socket/unixsocket.c b/ext/socket/unixsocket.c
index f29724db25..f8017924a8 100644
--- a/ext/socket/unixsocket.c
+++ b/ext/socket/unixsocket.c
@@ -66,7 +66,7 @@ rsock_init_unixsock(VALUE sock, VALUE path, int server)
     }
 
     if (server) {
-	if (listen(fd, 5) < 0) {
+	if (listen(fd, SOMAXCONN) < 0) {
 	    close(fd);
 	    rb_sys_fail("listen(2)");
 	}