diff --git a/libtiff/tif_dirinfo.c b/libtiff/tif_dirinfo.c
index c7babb4e..5a815c1d 100644
--- a/libtiff/tif_dirinfo.c
+++ b/libtiff/tif_dirinfo.c
@@ -1,4 +1,4 @@
-/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirinfo.c,v 1.17 2002-04-17 13:09:04 dron Exp $ */
+/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirinfo.c,v 1.18 2002-08-15 12:59:50 warmerda Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
@@ -463,6 +463,8 @@ _TIFFCreateAnonFieldInfo(TIFF *tif, ttag_t tag, TIFFDataType field_type)
     fld->field_oktochange = TRUE;
     fld->field_passcount = TRUE;
     fld->field_name = (char *) _TIFFmalloc(32);
+
+    /* note that this name is a special sign to TIFFClose() to free the field*/
     sprintf(fld->field_name, "Tag %d", (int) tag);
 
     return fld;