1 files changed, 8 insertions, 1 deletions
diff --git a/lib/strtoofft.h b/lib/strtoofft.h
index b812a67a0..1d0f328db 100644
--- a/lib/strtoofft.h
+++ b/lib/strtoofft.h
@@ -45,7 +45,14 @@
 #    define curlx_strtoofft strtoll
 #  else
 #    if defined(_MSC_VER) && (_MSC_VER >= 1300) && (_INTEGRAL_MAX_BITS >= 64)
-       _CRTIMP __int64 __cdecl _strtoi64(const char *, char **, int);
+#      if defined(_SAL_VERSION)
+         _Check_return_ _CRTIMP __int64 __cdecl _strtoi64(
+             _In_z_ const char *_String,
+             _Out_opt_ _Deref_post_z_ char **_EndPtr, _In_ int _Radix);
+#      else
+         _CRTIMP __int64 __cdecl _strtoi64(const char *_String,
+                                           char **_EndPtr, int _Radix);
+#      endif
 #      define curlx_strtoofft _strtoi64
 #    else
        curl_off_t curlx_strtoll(const char *nptr, char **endptr, int base);