diff --git a/include/ctype.h b/include/ctype.h
index f8acf16a..8066561a 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
diff --git a/lib/libc+gnu.c b/lib/libc+gnu.c
index 3e8d59f8..873228c4 100644
--- a/lib/libc+gnu.c
+++ b/lib/libc+gnu.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
diff --git a/lib/stdio/fflush.c b/lib/stdio/fflush.c
index c92587eb..b82fdd34 100644
--- a/lib/stdio/fflush.c
+++ b/lib/stdio/fflush.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -23,5 +23,8 @@
 int
 fflush (FILE *stream)
 {
-  fsync ((int)stream);
+  int filedes = (int)stream;
+  if (filedes < 3)
+    return 0;
+  return fsync (filedes);
 }