diff --git a/headers/posix/stdio.h b/headers/posix/stdio.h
index 73a74a8768..e0d395d218 100644
--- a/headers/posix/stdio.h
+++ b/headers/posix/stdio.h
@@ -120,7 +120,6 @@ extern FILE		*fopencookie(void *cookie, const char *mode, cookie_io_functions_t
 /* file I/O */
 extern int		fflush(FILE *stream);
 extern int		fflush_unlocked(FILE *stream);
-extern int		fpurge(FILE *stream);
 
 extern int		fgetpos(FILE *stream, fpos_t *position);
 extern int		fsetpos(FILE *stream, const fpos_t *position);
diff --git a/src/system/libroot/posix/glibc/libio/__fpurge.c b/src/system/libroot/posix/glibc/libio/__fpurge.c
index 68217c8769..b167343561 100644
--- a/src/system/libroot/posix/glibc/libio/__fpurge.c
+++ b/src/system/libroot/posix/glibc/libio/__fpurge.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2014 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -12,9 +12,11 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
 
+#include <stdlib.h>
 #include <stdio_ext.h>
 #include "libioP.h"
 
@@ -25,7 +27,7 @@ __fpurge (FILE *fp)
     {
       /* Wide-char stream.  */
       if (_IO_in_backup (fp))
-	_IO_free_wbackup_area (fp);
+	INTUSE(_IO_free_wbackup_area) (fp);
 
       fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
       fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;
@@ -34,16 +36,23 @@ __fpurge (FILE *fp)
     {
       /* Byte stream.  */
       if (_IO_in_backup (fp))
-	_IO_free_backup_area (fp);
+	INTUSE(_IO_free_backup_area) (fp);
 
       fp->_IO_read_end = fp->_IO_read_ptr;
       fp->_IO_write_ptr = fp->_IO_write_base;
     }
+
+  /* Avoid memory leak when there is an active ungetc buffer.  */
+  if (fp->_IO_save_base != NULL)
+    {
+      free (fp->_IO_save_base);
+      fp->_IO_save_base = NULL;
+    }
 }
 
 int
 fpurge(FILE* stream)
 {
-	__fpurge(stream);
-	return 0;
+  __fpurge(stream);
+  return 0;
 }