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diff --git a/lib/xbinary-io.h b/lib/xbinary-io.h
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+/* Binary mode I/O with checking
+ Copyright 2017-2022 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation, either version 3 of the
+ License, or (at your option) any later version.
+
+ This file 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifndef _XBINARY_IO_H
+#define _XBINARY_IO_H
+
+#include "binary-io.h"
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef XBINARY_IO_INLINE
+# define XBINARY_IO_INLINE _GL_INLINE
+#endif
+
+#if O_BINARY
+extern _Noreturn void xset_binary_mode_error (void);
+#else
+XBINARY_IO_INLINE void xset_binary_mode_error (void) {}
+#endif
+
+/* Set the mode of FD to MODE, which should be either O_TEXT or O_BINARY.
+ Report an error and exit if this fails. */
+
+XBINARY_IO_INLINE void
+xset_binary_mode (int fd, int mode)
+{
+ if (set_binary_mode (fd, mode) < 0)
+ xset_binary_mode_error ();
+}
+
+_GL_INLINE_HEADER_END
+
+#endif /* _XBINARY_IO_H */