1 files changed, 8 insertions, 1 deletions
diff --git a/libio/ioseekoff.c b/libio/ioseekoff.c
index 8c642165f6..b1c4729b3d 100644
--- a/libio/ioseekoff.c
+++ b/libio/ioseekoff.c
@@ -32,9 +32,14 @@ _IO_seekoff (fp, offset, dir, mode)
      int dir;
      int mode;
 {
+  _IO_pos_t retval;
+
   /* If we have a backup buffer, get rid of it, since the __seekoff
      callback may not know to do the right thing about it.
      This may be over-kill, but it'll do for now. TODO */
+  _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
+  _IO_flockfile (fp);
+
 
   if (_IO_have_backup (fp))
     {
@@ -42,6 +47,8 @@ _IO_seekoff (fp, offset, dir, mode)
 	offset -= fp->_IO_read_end - fp->_IO_read_ptr;
       _IO_free_backup_area (fp);
     }
+  retval = _IO_SEEKOFF (fp, offset, dir, mode);
 
-  return _IO_SEEKOFF (fp, offset, dir, mode);
+  _IO_cleanup_region_end (1);
+  return retval;
 }