diff --git a/port/snprintf.c b/port/snprintf.c
index 1c4ac087..3542ab75 100644
--- a/port/snprintf.c
+++ b/port/snprintf.c
@@ -16,7 +16,11 @@ int _TIFF_vsnprintf_f(char* str, size_t size, const char* format, va_list ap)
   int count = -1;
 
   if (size != 0)
+#if _MSC_VER <=	1310
+    count = _vsnprintf(str, size, format, ap);
+#else
     count = _vsnprintf_s(str, size, _TRUNCATE, format, ap);
+#endif
   if (count == -1)
     count = _vscprintf(format, ap);