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diff --git a/m4/stdio_h.m4 b/m4/stdio_h.m4
index 0e38758..e06461e 100644
--- a/m4/stdio_h.m4
+++ b/m4/stdio_h.m4
@@ -1,14 +1,18 @@
-# stdio_h.m4 serial 46
-dnl Copyright (C) 2007-2016 Free Software Foundation, Inc.
+# stdio_h.m4 serial 48
+dnl Copyright (C) 2007-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_STDIO_H],
 [
-  dnl For __USE_MINGW_ANSI_STDIO
-  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-
+  AH_VERBATIM([MINGW_ANSI_STDIO],
+[/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+])
+  AC_DEFINE([__USE_MINGW_ANSI_STDIO])
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
   gl_NEXT_HEADERS([stdio.h])