diff --git a/ChangeLog b/ChangeLog
index 437108dee..680ae9a96 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2010-10-24  suzuki toshiya  <mpsuzuki@hiroshima-u.ac.jp>
+
+	[cache] Hide internal macros incompatible with LLP64.
+
+	FT_POINTER_TO_ULONG(), FTC_FACE_ID_HASH() and
+	FTC_IMAGE_TYPE_HASH() are enclosed by
+	FT_CONFIG_OPTION_OLD_INTERNALS and hidden from
+	normal clients.
+
+	For the history of these macros, see the investigation:
+	http://lists.gnu.org/archive/html/freetype/2010-10/msg00022.html
+
 2010-10-24  suzuki toshiya  <mpsuzuki@hiroshima-u.ac.jp>
 
 	Change the type of FT_MEM_VAL() from FT_ULong to FT_PtrDist.
diff --git a/include/freetype/ftcache.h b/include/freetype/ftcache.h
index fe8664d0f..6af530622 100644
--- a/include/freetype/ftcache.h
+++ b/include/freetype/ftcache.h
@@ -214,12 +214,17 @@ FT_BEGIN_HEADER
 
  /* */
 
+#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
+
+  /* these macros are incompatible with LLP64, should not be used */
+
 #define FT_POINTER_TO_ULONG( p )  ( (FT_ULong)(FT_Pointer)(p) )
 
 #define FTC_FACE_ID_HASH( i )                                \
           ((FT_UInt32)(( FT_POINTER_TO_ULONG( i ) >> 3 ) ^   \
                        ( FT_POINTER_TO_ULONG( i ) << 7 ) ) )
 
+#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
 
   /*************************************************************************/
   /*************************************************************************/
@@ -700,11 +705,17 @@ FT_BEGIN_HEADER
             (d1)->width   == (d2)->width   && \
             (d1)->flags   == (d2)->flags   )
 
+#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
+
+  /* this macro is incompatible with LLP64, should not be used */
+
 #define FTC_IMAGE_TYPE_HASH( d )                          \
           (FT_UFast)( FTC_FACE_ID_HASH( (d)->face_id )  ^ \
                       ( (d)->width << 8 ) ^ (d)->height ^ \
                       ( (d)->flags << 4 )               )
 
+#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
+
 
   /*************************************************************************/
   /*                                                                       */
@@ -1096,6 +1107,7 @@ FT_BEGIN_HEADER
             (f1)->pix_width  == (f2)->pix_width  && \
             (f1)->pix_height == (f2)->pix_height )
 
+  /* this macro is incompatible with LLP64, should not be used */
 #define FTC_FONT_HASH( f )                              \
           (FT_UInt32)( FTC_FACE_ID_HASH((f)->face_id) ^ \
                        ((f)->pix_width << 8)          ^ \