diff --git a/lib/_debugger.js b/lib/_debugger.js
index 83086ffb59..831cc08cd6 100644
--- a/lib/_debugger.js
+++ b/lib/_debugger.js
@@ -9,6 +9,7 @@ const repl = Module.requireRepl();
 const inherits = util.inherits;
 const assert = require('assert');
 const spawn = require('child_process').spawn;
+const Buffer = require('buffer').Buffer;
 
 exports.start = function(argv, stdin, stdout) {
   argv || (argv = process.argv.slice(2));
diff --git a/lib/_http_client.js b/lib/_http_client.js
index f8239feb07..a7d714f7e0 100644
--- a/lib/_http_client.js
+++ b/lib/_http_client.js
@@ -13,6 +13,7 @@ const freeParser = common.freeParser;
 const debug = common.debug;
 const OutgoingMessage = require('_http_outgoing').OutgoingMessage;
 const Agent = require('_http_agent');
+const Buffer = require('buffer').Buffer;
 
 
 function ClientRequest(options, cb) {
diff --git a/lib/_http_outgoing.js b/lib/_http_outgoing.js
index 952b2ed082..b513852110 100644
--- a/lib/_http_outgoing.js
+++ b/lib/_http_outgoing.js
@@ -4,6 +4,7 @@ const assert = require('assert').ok;
 const Stream = require('stream');
 const timers = require('timers');
 const util = require('util');
+const Buffer = require('buffer').Buffer;
 const common = require('_http_common');
 
 const CRLF = common.CRLF;
diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index bebbc80e2b..709a445879 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -5,6 +5,7 @@ Readable.ReadableState = ReadableState;
 
 const EE = require('events').EventEmitter;
 const Stream = require('stream');
+const Buffer = require('buffer').Buffer;
 const util = require('util');
 const debug = util.debuglog('stream');
 var StringDecoder;
diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
index 06bde55616..5b374688b0 100644
--- a/lib/_stream_writable.js
+++ b/lib/_stream_writable.js
@@ -9,6 +9,7 @@ Writable.WritableState = WritableState;
 
 const util = require('util');
 const Stream = require('stream');
+const Buffer = require('buffer').Buffer;
 
 util.inherits(Writable, Stream);
 
diff --git a/lib/_tls_legacy.js b/lib/_tls_legacy.js
index 2ae922a81e..e0c60dbdf6 100644
--- a/lib/_tls_legacy.js
+++ b/lib/_tls_legacy.js
@@ -7,6 +7,7 @@ const tls = require('tls');
 const util = require('util');
 const common = require('_tls_common');
 const debug = util.debuglog('tls-legacy');
+const Buffer = require('buffer').Buffer;
 const Timer = process.binding('timer_wrap').Timer;
 var Connection = null;
 try {
diff --git a/lib/_tls_wrap.js b/lib/_tls_wrap.js
index 31e755a774..fe404213c2 100644
--- a/lib/_tls_wrap.js
+++ b/lib/_tls_wrap.js
@@ -8,6 +8,7 @@ const util = require('util');
 const listenerCount = require('events').listenerCount;
 const common = require('_tls_common');
 const StreamWrap = require('_stream_wrap').StreamWrap;
+const Buffer = require('buffer').Buffer;
 const Duplex = require('stream').Duplex;
 const debug = util.debuglog('tls');
 const Timer = process.binding('timer_wrap').Timer;
diff --git a/lib/assert.js b/lib/assert.js
index 70e784a50c..ea142ed01f 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -27,6 +27,7 @@
 // UTILITY
 const compare = process.binding('buffer').compare;
 const util = require('util');
+const Buffer = require('buffer').Buffer;
 const pSlice = Array.prototype.slice;
 
 // 1. The assert module provides functions that throw
diff --git a/lib/child_process.js b/lib/child_process.js
index d8d2ec6aac..6856c53266 100644
--- a/lib/child_process.js
+++ b/lib/child_process.js
@@ -6,6 +6,7 @@ const constants = require('constants');
 
 const uv = process.binding('uv');
 const spawn_sync = process.binding('spawn_sync');
+const Buffer = require('buffer').Buffer;
 const Pipe = process.binding('pipe_wrap').Pipe;
 const child_process = require('internal/child_process');
 
diff --git a/lib/crypto.js b/lib/crypto.js
index d0ecef42a2..510e8bfbdb 100644
--- a/lib/crypto.js
+++ b/lib/crypto.js
@@ -15,6 +15,7 @@ try {
   throw new Error('node.js not compiled with openssl crypto support.');
 }
 
+const Buffer = require('buffer').Buffer;
 const constants = require('constants');
 const stream = require('stream');
 const util = require('util');
diff --git a/lib/dgram.js b/lib/dgram.js
index 2b65b94bce..22dc7a2319 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const assert = require('assert');
+const Buffer = require('buffer').Buffer;
 const util = require('util');
 const events = require('events');
 const constants = require('constants');
diff --git a/lib/fs.js b/lib/fs.js
index add234420e..12a3ff0ffe 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -10,6 +10,7 @@ const pathModule = require('path');
 const binding = process.binding('fs');
 const constants = require('constants');
 const fs = exports;
+const Buffer = require('buffer').Buffer;
 const Stream = require('stream').Stream;
 const EventEmitter = require('events').EventEmitter;
 const FSReqWrap = binding.FSReqWrap;
diff --git a/lib/internal/child_process.js b/lib/internal/child_process.js
index 428250cb9e..c6bb41ffde 100644
--- a/lib/internal/child_process.js
+++ b/lib/internal/child_process.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const StringDecoder = require('string_decoder').StringDecoder;
+const Buffer = require('buffer').Buffer;
 const EventEmitter = require('events').EventEmitter;
 const net = require('net');
 const dgram = require('dgram');
diff --git a/lib/internal/smalloc.js b/lib/internal/smalloc.js
index f181cb60cf..bf7fc3310d 100644
--- a/lib/internal/smalloc.js
+++ b/lib/internal/smalloc.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const smalloc = process.binding('smalloc');
+const Buffer = require('buffer').Buffer;
 const kMaxLength = smalloc.kMaxLength;
 const kMinType = smalloc.kMinType;
 const kMaxType = smalloc.kMaxType;
diff --git a/lib/net.js b/lib/net.js
index 53095210fd..c5e1997252 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -8,6 +8,7 @@ const assert = require('assert');
 const cares = process.binding('cares_wrap');
 const uv = process.binding('uv');
 
+const Buffer = require('buffer').Buffer;
 const TTYWrap = process.binding('tty_wrap');
 const TCP = process.binding('tcp_wrap').TCP;
 const Pipe = process.binding('pipe_wrap').Pipe;
diff --git a/lib/querystring.js b/lib/querystring.js
index 6aa188725a..8735d2814b 100644
--- a/lib/querystring.js
+++ b/lib/querystring.js
@@ -3,6 +3,7 @@
 'use strict';
 
 const QueryString = exports;
+const Buffer = require('buffer').Buffer;
 
 
 function charCode(c) {
diff --git a/lib/readline.js b/lib/readline.js
index 4107c99824..865b6e0b56 100644
--- a/lib/readline.js
+++ b/lib/readline.js
@@ -10,6 +10,7 @@ const kHistorySize = 30;
 
 const util = require('util');
 const inherits = util.inherits;
+const Buffer = require('buffer').Buffer;
 const EventEmitter = require('events').EventEmitter;
 
 
diff --git a/lib/string_decoder.js b/lib/string_decoder.js
index 62ea38e08f..0c9fdfb416 100644
--- a/lib/string_decoder.js
+++ b/lib/string_decoder.js
@@ -1,5 +1,7 @@
 'use strict';
 
+const Buffer = require('buffer').Buffer;
+
 function assertEncoding(encoding) {
   // Do not cache `Buffer.isEncoding`, some modules monkey-patch it to support
   // additional encodings
diff --git a/lib/tls.js b/lib/tls.js
index 10c82860ba..714fdebfc0 100644
--- a/lib/tls.js
+++ b/lib/tls.js
@@ -4,6 +4,7 @@ const net = require('net');
 const url = require('url');
 const util = require('util');
 const binding = process.binding('crypto');
+const Buffer = require('buffer').Buffer;
 
 // Allow {CLIENT_RENEG_LIMIT} client-initiated session renegotiations
 // every {CLIENT_RENEG_WINDOW} seconds. An error event is emitted if more
diff --git a/lib/util.js b/lib/util.js
index c4aea9d588..177cf454ee 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const uv = process.binding('uv');
+const Buffer = require('buffer').Buffer;
 const Debug = require('vm').runInDebugContext('Debug');
 const internalUtil = require('internal/util');
 
diff --git a/lib/zlib.js b/lib/zlib.js
index 4dd8b30b28..ebb0377912 100644
--- a/lib/zlib.js
+++ b/lib/zlib.js
@@ -1,5 +1,6 @@
 'use strict';
 
+const Buffer = require('buffer').Buffer;
 const Transform = require('_stream_transform');
 const binding = process.binding('zlib');
 const util = require('util');