diff -r 7005c03f7387 -r b54a2984cdd4 contrib/python-zstandard/zstd/common/mem.h
--- a/contrib/python-zstandard/zstd/common/mem.h	Sat Jan 14 20:05:15 2017 +0530
+++ b/contrib/python-zstandard/zstd/common/mem.h	Sat Jan 14 19:41:43 2017 -0800
@@ -55,14 +55,16 @@
   typedef  int32_t S32;
   typedef uint64_t U64;
   typedef  int64_t S64;
+  typedef intptr_t iPtrDiff;
 #else
-  typedef unsigned char       BYTE;
+  typedef unsigned char      BYTE;
   typedef unsigned short      U16;
   typedef   signed short      S16;
   typedef unsigned int        U32;
   typedef   signed int        S32;
   typedef unsigned long long  U64;
   typedef   signed long long  S64;
+  typedef ptrdiff_t      iPtrDiff;
 #endif