ext/kgio/sock_for_fd.h in kgio-2.6.0 vs ext/kgio/sock_for_fd.h in kgio-2.7.0

@@ -27,12 +27,14 @@
 #endif
 
 #if SOCK_FOR_FD == 19  /* modeled after ext/socket/init.c */
 static VALUE sock_for_fd(VALUE klass, int fd)
 {
-	VALUE sock = rb_obj_alloc(klass);
+	VALUE sock;
 	rb_io_t *fp;
 
+	rb_update_max_fd(fd); /* 1.9.3+ API */
+	sock = rb_obj_alloc(klass);
 	MakeOpenFile(sock, fp);
 	fp->fd = fd;
 	fp->mode = FMODE_READWRITE|FMODE_DUPLEX|FMODE_NOREVLOOKUP;
 	rb_io_ascii8bit_binmode(sock);
 	rb_io_synchronized(fp);