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diff --git a/libssp/snprintf-chk.c b/libssp/snprintf-chk.c
new file mode 100644
index 00000000..37ce77b1
--- /dev/null
+++ b/libssp/snprintf-chk.c
@@ -0,0 +1,61 @@
+/* Checking snprintf.
+   Copyright (C) 2005, 2009 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC 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, or (at your option) any later
+version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+GCC 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+#include "config.h"
+#include <ssp/ssp.h>
+#include <stdarg.h>
+#ifdef HAVE_STDIO_H
+# include <stdio.h>
+#endif
+
+extern void __chk_fail (void) __attribute__((__noreturn__));
+
+#ifdef HAVE_USABLE_VSNPRINTF
+int
+__snprintf_chk (char *s, size_t n, int flags __attribute__((unused)),
+		size_t slen, const char *format, ...)
+{
+  va_list arg;
+  int done;
+
+  if (n > slen)
+    __chk_fail ();
+
+  va_start (arg, format);
+  done = vsnprintf (s, n, format, arg);
+  va_end (arg);
+
+  return done;
+}
+#endif