diff --git a/mingw-w64-headers/include/ChangeLog b/mingw-w64-headers/include/ChangeLog
index 340df31..77ef20a 100644
--- a/mingw-w64-headers/include/ChangeLog
+++ b/mingw-w64-headers/include/ChangeLog
@@ -1,5 +1,9 @@
 2009-08-14  Kai Tietz  <kai.tietz@onevision.com>
 
+	PR/2836856
+	* time.h (size_t): Remove double definition code.
+	(ssize_t): Likewise.
+
 	* winnt.h (InterlockedIncrement... and InterlockedDecrement...): Adjust
 	inline version to be compatible to VC.
 
diff --git a/mingw-w64-headers/include/time.h b/mingw-w64-headers/include/time.h
index fb6ab66..5bd735d 100644
--- a/mingw-w64-headers/include/time.h
+++ b/mingw-w64-headers/include/time.h
@@ -160,32 +160,6 @@
   unsigned __cdecl _getsystime(struct tm *_Tm);
   unsigned __cdecl _setsystime(struct tm *_Tm,unsigned _MilliSec);
 
-#ifndef _SIZE_T_DEFINED
-#define _SIZE_T_DEFINED
-#ifdef _WIN64
-#if defined(__GNUC__) && defined(__STRICT_ANSI__)
-  typedef unsigned int size_t __attribute__ ((__mode__ (DI)));
-#else
-  typedef unsigned __int64 size_t;
-#endif
-#else
-  typedef unsigned long size_t;
-#endif
-#endif
-
-#ifndef _SSIZE_T_DEFINED
-#define _SSIZE_T_DEFINED
-#ifdef _WIN64
-#if defined(__GNUC__) && defined(__STRICT_ANSI__)
-  typedef int ssize_t __attribute__ ((__mode__ (DI)));
-#else
-  typedef __int64 ssize_t;
-#endif
-#else
-  typedef long ssize_t;
-#endif
-#endif
-
 #ifndef _WTIME_DEFINED
   _CRTIMP wchar_t *__cdecl _wasctime(const struct tm *_Tm);
   _CRTIMP wchar_t *__cdecl _wctime32(const __time32_t *_Time);