diff -up meshlab-1.3.1/vcglib/wrap/io_tetramesh/import_ply.h.cstddef meshlab-1.3.1/vcglib/wrap/io_tetramesh/import_ply.h
--- meshlab-1.3.1/vcglib/wrap/io_tetramesh/import_ply.h.cstddef	2011-01-25 00:53:39.000000000 -0700
+++ meshlab-1.3.1/vcglib/wrap/io_tetramesh/import_ply.h	2011-10-21 14:02:55.553245328 -0600
@@ -36,6 +36,7 @@ created
 #include<wrap/ply/io_mask.h>
 #include<wrap/io_tetramesh/io_ply.h>
 #include<vcg/complex/tetramesh/allocate.h>
+#include <cstddef>
 
 
 
diff -up meshlab-1.3.1/vcglib/wrap/io_trimesh/import_ply.h.cstddef meshlab-1.3.1/vcglib/wrap/io_trimesh/import_ply.h
--- meshlab-1.3.1/vcglib/wrap/io_trimesh/import_ply.h.cstddef	2011-07-29 11:40:13.000000000 -0600
+++ meshlab-1.3.1/vcglib/wrap/io_trimesh/import_ply.h	2011-10-21 14:03:33.629858444 -0600
@@ -28,6 +28,7 @@
 #include<wrap/io_trimesh/io_mask.h>
 #include<wrap/io_trimesh/io_ply.h>
 #include<vcg/complex/algorithms/create/platonic.h>
+#include<cstddef>
 
 namespace vcg {
 namespace tri {
diff -up meshlab-1.3.1/vcglib/wrap/ply/plystuff.h.cstddef meshlab-1.3.1/vcglib/wrap/ply/plystuff.h
--- meshlab-1.3.1/vcglib/wrap/ply/plystuff.h.cstddef	2011-01-25 00:53:42.000000000 -0700
+++ meshlab-1.3.1/vcglib/wrap/ply/plystuff.h	2011-10-21 14:02:55.555245256 -0600
@@ -57,6 +57,7 @@ Cleaning of the automatic bbox caching s
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h> 
+#include <cstddef>
 #ifdef WIN32
 #include <io.h>
 #endif