diff --git a/src/php/lib/Grpc/AbstractCall.php b/src/php/lib/Grpc/AbstractCall.php
index b813d16470d3a650c9b1d999b891de857da74266..d7c32630403b1291f5e3bfcf7fb5505d46fddac2 100644
--- a/src/php/lib/Grpc/AbstractCall.php
+++ b/src/php/lib/Grpc/AbstractCall.php
@@ -33,7 +33,7 @@
  */
 namespace Grpc;
 
-require_once realpath(dirname(__FILE__) . '/../autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 
 abstract class AbstractCall {
 
diff --git a/src/php/lib/Grpc/BaseStub.php b/src/php/lib/Grpc/BaseStub.php
index 9bc1711110686cdb45a5b5dcecfafd4a4fbd538b..83e992ae709414ababb9275346b41049238dc86e 100755
--- a/src/php/lib/Grpc/BaseStub.php
+++ b/src/php/lib/Grpc/BaseStub.php
@@ -32,7 +32,7 @@
  *
  */
 namespace Grpc;
-require_once realpath(dirname(__FILE__) . '/../autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 
 /**
  * Base class for generated client stubs. Stub methods are expected to call
diff --git a/src/php/lib/Grpc/BidiStreamingCall.php b/src/php/lib/Grpc/BidiStreamingCall.php
index 0d3dd629f254825aeeca403f1019decdce407b7f..d45fd21510e558e9543400fcede9b683fdc087c0 100644
--- a/src/php/lib/Grpc/BidiStreamingCall.php
+++ b/src/php/lib/Grpc/BidiStreamingCall.php
@@ -32,7 +32,7 @@
  *
  */
 namespace Grpc;
-require_once realpath(dirname(__FILE__) . '/../autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 
 /**
  * Represents an active call that allows for sending and recieving messages in
diff --git a/src/php/lib/Grpc/ClientStreamingCall.php b/src/php/lib/Grpc/ClientStreamingCall.php
index 4b3abcbdec5a9ffe8c5b492c77f843cd94a16d31..17c85b4c2babfa88863286345d64a7491569bf9c 100644
--- a/src/php/lib/Grpc/ClientStreamingCall.php
+++ b/src/php/lib/Grpc/ClientStreamingCall.php
@@ -32,7 +32,7 @@
  *
  */
 namespace Grpc;
-require_once realpath(dirname(__FILE__) . '/../autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 
 /**
  * Represents an active call that sends a stream of messages and then gets a
diff --git a/src/php/lib/Grpc/ServerStreamingCall.php b/src/php/lib/Grpc/ServerStreamingCall.php
index 7458f28bcbfae4563561fe7e6359976e71cfc7a7..ac5e02eb5320c8b4d5b18814ddb7af0a81da257d 100644
--- a/src/php/lib/Grpc/ServerStreamingCall.php
+++ b/src/php/lib/Grpc/ServerStreamingCall.php
@@ -33,7 +33,7 @@
  */
 namespace Grpc;
 
-require_once realpath(dirname(__FILE__) . '/../autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 
 /**
  * Represents an active call that sends a single message and then gets a stream
diff --git a/src/php/lib/Grpc/UnaryCall.php b/src/php/lib/Grpc/UnaryCall.php
index bbf9cfb5883f2be0281fa50b3fc2be6b33cfa5f3..14c024085c2117ef4e1d7e0857717ad39500d4a0 100644
--- a/src/php/lib/Grpc/UnaryCall.php
+++ b/src/php/lib/Grpc/UnaryCall.php
@@ -33,7 +33,7 @@
  */
 namespace Grpc;
 
-require_once realpath(dirname(__FILE__) . '/../autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 
 /**
  * Represents an active call that sends a single message and then gets a single
diff --git a/src/php/lib/autoload.php b/src/php/lib/autoload.php
deleted file mode 100755
index 42eb33d65b72a18764ec0ff85458957bc9bd6874..0000000000000000000000000000000000000000
--- a/src/php/lib/autoload.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-function grpcAutoloader($class) {
-  $prefix = 'Grpc\\';
-
-  $base_dir = __DIR__ . '/Grpc/';
-
-  $len = strlen($prefix);
-  if (strncmp($prefix, $class, $len) !== 0) {
-    return;
-  }
-
-  $relative_class = substr($class, $len);
-
-  $file = $base_dir . str_replace('\\', '/', $relative_class) . '.php';
-
-  if (file_exists($file)) {
-    include $file;
-  }
-}
-
-spl_autoload_register('grpcAutoloader');
diff --git a/src/php/tests/generated_code/GeneratedCodeTest.php b/src/php/tests/generated_code/GeneratedCodeTest.php
index cb2c0e6d10624dd62f6947aec5a395850f224224..afd7f21de42be4c7ca70510e2ba3bfb3473302eb 100755
--- a/src/php/tests/generated_code/GeneratedCodeTest.php
+++ b/src/php/tests/generated_code/GeneratedCodeTest.php
@@ -31,7 +31,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
-require_once realpath(dirname(__FILE__) . '/../../lib/autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 require 'DrSlump/Protobuf.php';
 \DrSlump\Protobuf::autoload();
 require 'math.php';
diff --git a/src/php/tests/interop/interop_client.php b/src/php/tests/interop/interop_client.php
index 7ee089e241541345491f9ca1577806a63e96eb30..873fa00b827619d9e54aa5ce502f1b84153963f2 100755
--- a/src/php/tests/interop/interop_client.php
+++ b/src/php/tests/interop/interop_client.php
@@ -31,7 +31,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
-require_once realpath(dirname(__FILE__) . '/../../lib/autoload.php');
+require_once realpath(dirname(__FILE__) . '/../../vendor/autoload.php');
 require 'DrSlump/Protobuf.php';
 \DrSlump\Protobuf::autoload();
 require 'empty.php';