diff --git a/libtiff/tif_win32.c b/libtiff/tif_win32.c
index 5d294746..24b824f1 100644
--- a/libtiff/tif_win32.c
+++ b/libtiff/tif_win32.c
@@ -1,4 +1,4 @@
-/* $Id: tif_win32.c,v 1.40 2012-11-18 17:51:52 bfriesen Exp $ */
+/* $Id: tif_win32.c,v 1.41 2015-08-23 20:12:44 bfriesen Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
@@ -28,6 +28,31 @@
  * TIFF Library Win32-specific Routines.  Adapted from tif_unix.c 4/5/95 by
  * Scott Wagner (wagner@itek.com), Itek Graphix, Rochester, NY USA
  */
+
+/*
+  CreateFileA/CreateFileW return type 'HANDLE'.
+
+  thandle_t is declared like
+
+    DECLARE_HANDLE(thandle_t);
+
+  in tiffio.h.
+
+  Windows (from winnt.h) DECLARE_HANDLE logic looks like
+
+  #ifdef STRICT
+    typedef void *HANDLE;
+  #define DECLARE_HANDLE(name) struct name##__ { int unused; }; typedef struct name##__ *name
+  #else
+    typedef PVOID HANDLE;
+  #define DECLARE_HANDLE(name) typedef HANDLE name
+  #endif
+
+  See http://bugzilla.maptools.org/show_bug.cgi?id=1941 for problems in WIN64
+  builds resulting from this.  Unfortunately, the proposed patch was lost.
+
+*/
+  
 #include "tiffiop.h"
 
 #include <windows.h>
@@ -214,7 +239,7 @@ TIFFFdOpen(int ifd, const char* name, const char* mode)
 			break;
 		}
 	}
-	tif = TIFFClientOpen(name, mode, (thandle_t)ifd,
+	tif = TIFFClientOpen(name, mode, (thandle_t)ifd, /* FIXME: WIN64 cast to pointer warning */
 			_tiffReadProc, _tiffWriteProc,
 			_tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
 			fSuppressMap ? _tiffDummyMapProc : _tiffMapProc,
@@ -259,7 +284,7 @@ TIFFOpen(const char* name, const char* mode)
 		return ((TIFF *)0);
 	}
 
-	tif = TIFFFdOpen((int)fd, name, mode);
+	tif = TIFFFdOpen((int)fd, name, mode);   /* FIXME: WIN64 cast from pointer to int warning */
 	if(!tif)
 		CloseHandle(fd);
 	return tif;
@@ -314,7 +339,7 @@ TIFFOpenW(const wchar_t* name, const char* mode)
 				    NULL, NULL);
 	}
 
-	tif = TIFFFdOpen((int)fd,
+	tif = TIFFFdOpen((int)fd,    /* FIXME: WIN64 cast from pointer to int warning */
 			 (mbname != NULL) ? mbname : "<unknown>", mode);
 	if(!tif)
 		CloseHandle(fd);