--- a/stdint.h
+++ b/stdint.h
@@ -72,21 +72,21 @@ extern "C" {
 // realize that, e.g. char has the same size as __int8
 // so we give up on __intX for them.
 #if (_MSC_VER < 1300)
-   typedef char              int8_t;
-   typedef short             int16_t;
-   typedef int               int32_t;
+   typedef signed char       int8_t;
+   typedef signed short      int16_t;
+   typedef signed int        int32_t;
    typedef unsigned char     uint8_t;
    typedef unsigned short    uint16_t;
    typedef unsigned int      uint32_t;
 #else
-   typedef __int8            int8_t;
-   typedef __int16           int16_t;
-   typedef __int32           int32_t;
+   typedef signed __int8     int8_t;
+   typedef signed __int16    int16_t;
+   typedef signed __int32    int32_t;
    typedef unsigned __int8   uint8_t;
    typedef unsigned __int16  uint16_t;
    typedef unsigned __int32  uint32_t;
 #endif
-typedef __int64              int64_t;
+typedef signed __int64       int64_t;
 typedef unsigned __int64     uint64_t;
 
 
@@ -112,11 +112,11 @@ typedef uint64_t  uint_fast64_t;
 
 // 7.18.1.4 Integer types capable of holding object pointers
 #ifdef _WIN64 // [
-   typedef __int64           intptr_t;
+   typedef signed __int64    intptr_t;
    typedef unsigned __int64  uintptr_t;
 #else // _WIN64 ][
-   typedef _W64 int               intptr_t;
-   typedef _W64 unsigned int      uintptr_t;
+   typedef _W64 signed int   intptr_t;
+   typedef _W64 unsigned int uintptr_t;
 #endif // _WIN64 ]
 
 // 7.18.1.5 Greatest-width integer types