1 files changed, 19 insertions, 0 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 5c91c390ec..8558e99ee5 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -1424,6 +1424,24 @@ tcp_svr_init(argc, argv, sock)
 	return init_inetsock(sock, Qnil, arg1, Qnil, Qnil, INET_SERVER);
 }
 
+static void
+make_fd_nonblock(int fd)
+{
+    int flags;
+#ifdef F_GETFL
+    flags = fcntl(fd, F_GETFL);
+    if (flags == -1) {
+        rb_sys_fail(0);
+    }
+#else
+    flags = 0;
+#endif
+    flags |= O_NONBLOCK;
+    if (fcntl(fd, F_SETFL, flags) == -1) {
+        rb_sys_fail(0);
+    }
+}
+
 static VALUE
 s_accept_nonblock(VALUE klass, OpenFile *fptr, struct sockaddr *sockaddr, socklen_t *len)
 {
@@ -1435,6 +1453,7 @@ s_accept_nonblock(VALUE klass, OpenFile *fptr, struct sockaddr *sockaddr, sockle
     if (fd2 < 0) {
         rb_sys_fail("accept(2)");
     }
+    make_fd_nonblock(fd2);
     return init_sock(rb_obj_alloc(klass), fd2);
 }