diff --git a/lib/linux/_open3.c b/lib/linux/_open3.c
index 3072f9bf..12f6be2d 100644
--- a/lib/linux/_open3.c
+++ b/lib/linux/_open3.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2016,2017,2018,2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -26,7 +26,9 @@
 int
 _open3 (char const *file_name, int flags, int mask)
 {
-  int r = _sys_call3 (SYS_open, (long) file_name, (int) flags, (int) mask);
+  long long_file_name = cast_int_to_long (file_name);
+  int r = _sys_call3 (SYS_open, long_file_name, flags, mask);
+  __ungetc_init ();
   if (r > 2)
     {
       __ungetc_clear (r);
diff --git a/lib/stub/__buffered_read.c b/lib/stub/__buffered_read.c
new file mode 100644
index 00000000..aaa00247
--- /dev/null
+++ b/lib/stub/__buffered_read.c
@@ -0,0 +1,33 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <mes/lib.h>
+#include <stdlib.h>
+#include <string.h>
+
+void
+__buffered_read_init (int filedes)
+{
+}
+
+size_t
+__buffered_read_clear (int filedes)
+{
+}