diff --git a/ChangeLog b/ChangeLog
index 729512d3..e10e5f4e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2008-05-26  Frank Warmerdam  <warmerdam@pobox.com>
 
+	* tif_config.*.h, tiffconf.*.h: Remove SIZEOF_LONG definition, unused.
+
 	* libtiff/tif_win32.c: Replace custom Win32 memory api with generic
 	POSIX one.  No apparent value to use of GlobalAlloc() in the modern
 	age.  http://bugzilla.maptools.org/show_bug.cgi?id=1885
diff --git a/libtiff/tif_config.vc.h b/libtiff/tif_config.vc.h
index fa16a198..bcd33c09 100644
--- a/libtiff/tif_config.vc.h
+++ b/libtiff/tif_config.vc.h
@@ -29,9 +29,6 @@
 /* The size of a `int', as computed by sizeof. */
 #define SIZEOF_INT 4
 
-/* The size of a `long', as computed by sizeof. */
-#define SIZEOF_LONG 4
-
 /* Set the native cpu bit order */
 #define HOST_FILLORDER FILLORDER_LSB2MSB
 
diff --git a/libtiff/tif_config.wince.h b/libtiff/tif_config.wince.h
index a434383f..63b34604 100644
--- a/libtiff/tif_config.wince.h
+++ b/libtiff/tif_config.wince.h
@@ -1,4 +1,4 @@
-/* $Id: tif_config.wince.h,v 1.1 2007-01-15 18:40:39 mloskot Exp $ */
+/* $Id: tif_config.wince.h,v 1.2 2008-05-26 19:05:51 fwarmerdam Exp $ */
 
 /*
  * TIFF library configuration header for Windows CE platform.
@@ -46,9 +46,6 @@
 /* The size of a `int', as computed by sizeof. */
 #define SIZEOF_INT 4
 
-/* The size of a `long', as computed by sizeof. */
-#define SIZEOF_LONG 4
-
 /* Set the native cpu bit order */
 #define HOST_FILLORDER FILLORDER_LSB2MSB
 
diff --git a/libtiff/tiffconf.vc.h b/libtiff/tiffconf.vc.h
index 66dfb42a..7c90c316 100644
--- a/libtiff/tiffconf.vc.h
+++ b/libtiff/tiffconf.vc.h
@@ -19,9 +19,6 @@
 /* The size of a `int', as computed by sizeof. */
 #define SIZEOF_INT 4
 
-/* The size of a `long', as computed by sizeof. */
-#define SIZEOF_LONG 4
-
 /* Signed 8-bit type */
 #define TIFF_INT8_T signed char
 
diff --git a/libtiff/tiffconf.wince.h b/libtiff/tiffconf.wince.h
index c2d00d7e..9c966499 100644
--- a/libtiff/tiffconf.wince.h
+++ b/libtiff/tiffconf.wince.h
@@ -1,4 +1,4 @@
-/* $Id: tiffconf.wince.h,v 1.1 2007-01-15 18:40:39 mloskot Exp $ */
+/* $Id: tiffconf.wince.h,v 1.2 2008-05-26 19:05:51 fwarmerdam Exp $ */
 
 /*
  * Windows CE platform tiffconf.wince.h
@@ -39,9 +39,6 @@
 /* The size of a `int', as computed by sizeof. */
 #define SIZEOF_INT 4
 
-/* The size of a `long', as computed by sizeof. */
-#define SIZEOF_LONG 4
-
 /* Compatibility stuff. */
 
 /* Define as 0 or 1 according to the floating point format suported by the