diff --git a/ChangeLog b/ChangeLog
index e98183c2c..146d74e56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2015-02-16  Werner Lemberg  <wl@gnu.org>
+
+	* include/internal/ftmemory.h: Add some `FT_Offset' casts.
+	(FT_MEM_SET, FT_MEM_COPY, FT_MEM_MOVE, FT_ARRAY_ZERO, FT_ARRAY_COPY,
+	FT_MEM_MOVE): Do it.
+
 2015-02-15  Werner Lemberg  <wl@gnu.org>
 
 	[base] Clean up signedness issues in `ftdbgmem.c'.
diff --git a/include/internal/ftmemory.h b/include/internal/ftmemory.h
index 87577afe6..c0c553b4f 100644
--- a/include/internal/ftmemory.h
+++ b/include/internal/ftmemory.h
@@ -215,11 +215,14 @@ FT_BEGIN_HEADER
 #define FT_MEM_SET_ERROR( cond )  ( (cond), error != 0 )
 
 
-#define FT_MEM_SET( dest, byte, count )     ft_memset( dest, byte, count )
+#define FT_MEM_SET( dest, byte, count )               \
+          ft_memset( dest, byte, (FT_Offset)(count) )
 
-#define FT_MEM_COPY( dest, source, count )  ft_memcpy( dest, source, count )
+#define FT_MEM_COPY( dest, source, count )              \
+          ft_memcpy( dest, source, (FT_Offset)(count) )
 
-#define FT_MEM_MOVE( dest, source, count )  ft_memmove( dest, source, count )
+#define FT_MEM_MOVE( dest, source, count )               \
+          ft_memmove( dest, source, (FT_Offset)(count) )
 
 
 #define FT_MEM_ZERO( dest, count )  FT_MEM_SET( dest, 0, count )
@@ -227,14 +230,19 @@ FT_BEGIN_HEADER
 #define FT_ZERO( p )                FT_MEM_ZERO( p, sizeof ( *(p) ) )
 
 
-#define FT_ARRAY_ZERO( dest, count )                        \
-          FT_MEM_ZERO( dest, (count) * sizeof ( *(dest) ) )
+#define FT_ARRAY_ZERO( dest, count )                             \
+          FT_MEM_ZERO( dest,                                     \
+                       (FT_Offset)(count) * sizeof ( *(dest) ) )
 
-#define FT_ARRAY_COPY( dest, source, count )                        \
-          FT_MEM_COPY( dest, source, (count) * sizeof ( *(dest) ) )
+#define FT_ARRAY_COPY( dest, source, count )                     \
+          FT_MEM_COPY( dest,                                     \
+                       source,                                   \
+                       (FT_Offset)(count) * sizeof ( *(dest) ) )
 
-#define FT_ARRAY_MOVE( dest, source, count )                        \
-          FT_MEM_MOVE( dest, source, (count) * sizeof ( *(dest) ) )
+#define FT_ARRAY_MOVE( dest, source, count )                     \
+          FT_MEM_MOVE( dest,                                     \
+                       source,                                   \
+                       (FT_Offset)(count) * sizeof ( *(dest) ) )
 
 
   /*