Index: source/lib/adts/ring_buf.h
===================================================================
--- source/lib/adts/ring_buf.h
+++ source/lib/adts/ring_buf.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011 Wildfire Games.
+/* Copyright (C) 2018 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -27,6 +27,8 @@
 #ifndef INCLUDED_ADTS_RING_BUF
 #define INCLUDED_ADTS_RING_BUF
 
+# pragma warning(disable:4351) // new behavior: elements of array 'array' will be default initialize
+
 template<class T, size_t n> class RingBuf
 {
 	size_t size_;	// # of entries in buffer
@@ -209,4 +211,6 @@
 	}
 };
 
+# pragma warning(default:4351)
+
 #endif	// #ifndef INCLUDED_ADTS_RING_BUF
Index: source/lib/file/io/io.h
===================================================================
--- source/lib/file/io/io.h
+++ source/lib/file/io/io.h
@@ -28,6 +28,8 @@
 #ifndef INCLUDED_IO
 #define INCLUDED_IO
 
+# pragma warning(disable:4351) // new behavior: elements of array 'array' will be default initialize
+
 #include "lib/config2.h"
 #include "lib/alignment.h"
 #include "lib/bits.h"
@@ -358,4 +360,6 @@
 
 }	// namespace io
 
+# pragma warning(default:4351)
+
 #endif	// #ifndef INCLUDED_IO