diff --git a/src/Composer/Autoload/AutoloadGenerator.php b/src/Composer/Autoload/AutoloadGenerator.php
index 7ea1a3444..4d04f7a2f 100644
--- a/src/Composer/Autoload/AutoloadGenerator.php
+++ b/src/Composer/Autoload/AutoloadGenerator.php
@@ -545,7 +545,7 @@ EOF;
             }
         }
 
-        if (preg_match('/\.phar.+$/', $path)) {
+        if (strpos($path, '.phar') !== false) {
             $baseDir = "'phar://' . " . $baseDir;
         }
 
@@ -769,10 +769,14 @@ HEADER;
         $filesystem = new Filesystem();
 
         $vendorPathCode = ' => ' . $filesystem->findShortestPathCode(realpath($targetDir), $vendorPath, true, true) . " . '/";
+        $vendorPharPathCode = ' => \'phar://\' . ' . $filesystem->findShortestPathCode(realpath($targetDir), $vendorPath, true, true) . " . '/";
         $appBaseDirCode = ' => ' . $filesystem->findShortestPathCode(realpath($targetDir), $basePath, true, true) . " . '/";
+        $appBaseDirPharCode = ' => \'phar://\' . ' . $filesystem->findShortestPathCode(realpath($targetDir), $basePath, true, true) . " . '/";
 
         $absoluteVendorPathCode = ' => ' . substr(var_export(rtrim($vendorDir, '\\/') . '/', true), 0, -1);
+        $absoluteVendorPharPathCode = ' => ' . substr(var_export(rtrim('phar://' . $vendorDir, '\\/') . '/', true), 0, -1);
         $absoluteAppBaseDirCode = ' => ' . substr(var_export(rtrim($baseDir, '\\/') . '/', true), 0, -1);
+        $absoluteAppBaseDirPharCode = ' => ' . substr(var_export(rtrim('phar://' . $baseDir, '\\/') . '/', true), 0, -1);
 
         $initializer = '';
         $prefix = "\0Composer\Autoload\ClassLoader\0";
@@ -795,9 +799,15 @@ HEADER;
                 // See https://bugs.php.net/68057
                 $staticPhpVersion = 70000;
             }
-            $value = var_export($value, true);
-            $value = str_replace($absoluteVendorPathCode, $vendorPathCode, $value);
-            $value = str_replace($absoluteAppBaseDirCode, $appBaseDirCode, $value);
+            $value = strtr(
+                var_export($value, true),
+                array(
+                    $absoluteVendorPathCode => $vendorPathCode,
+                    $absoluteVendorPharPathCode => $vendorPharPathCode,
+                    $absoluteAppBaseDirCode => $appBaseDirCode,
+                    $absoluteAppBaseDirPharCode => $appBaseDirPharCode,
+                )
+            );
             $value = ltrim(preg_replace('/^ */m', '    $0$0', $value));
 
             $file .= sprintf("    public static $%s = %s;\n\n", $prop, $value);
diff --git a/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php b/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
index c1605bf97..84ac16df7 100644
--- a/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
+++ b/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
@@ -486,6 +486,47 @@ class AutoloadGeneratorTest extends TestCase
         $this->assertFileExists($this->vendorDir.'/composer/autoload_classmap.php', "ClassMap file needs to be generated, even if empty.");
     }
 
+    public function testPharAutoload()
+    {
+        $package = new Package('a', '1.0', '1.0');
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+        ));
+
+        $package->setAutoload(array(
+            'psr-0' => array(
+                'Foo' => 'foo.phar',
+                'Bar' => 'dir/bar.phar/src',
+            ),
+            'psr-4' => array(
+                'Baz\\' => 'baz.phar',
+                'Qux\\' => 'dir/qux.phar/src',
+            ),
+        ));
+
+        $vendorPackage = new Package('a/a', '1.0', '1.0');
+        $vendorPackage->setAutoload(array(
+            'psr-0' => array(
+                'Lorem' => 'lorem.phar',
+                'Ipsum' => 'dir/ipsum.phar/src',
+            ),
+            'psr-4' => array(
+                'Dolor\\' => 'dolor.phar',
+                'Sit\\' => 'dir/sit.phar/src',
+            ),
+        ));
+
+        $this->repository->expects($this->once())
+            ->method('getCanonicalPackages')
+            ->will($this->returnValue(array($vendorPackage)));
+
+        $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', true, 'Phar');
+
+        $this->assertAutoloadFiles('phar', $this->vendorDir . '/composer');
+        $this->assertAutoloadFiles('phar_psr4', $this->vendorDir . '/composer', 'psr4');
+        $this->assertAutoloadFiles('phar_static', $this->vendorDir . '/composer', 'static');
+    }
+
     public function testPSRToClassMapIgnoresNonExistingDir()
     {
         $package = new Package('a', '1.0', '1.0');
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_phar.php b/tests/Composer/Test/Autoload/Fixtures/autoload_phar.php
new file mode 100644
index 000000000..7654005f3
--- /dev/null
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_phar.php
@@ -0,0 +1,13 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Lorem' => array('phar://' . $vendorDir . '/a/a/lorem.phar'),
+    'Ipsum' => array('phar://' . $vendorDir . '/a/a/dir/ipsum.phar/src'),
+    'Foo' => array('phar://' . $baseDir . '/foo.phar'),
+    'Bar' => array('phar://' . $baseDir . '/dir/bar.phar/src'),
+);
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_phar_psr4.php b/tests/Composer/Test/Autoload/Fixtures/autoload_phar_psr4.php
new file mode 100644
index 000000000..f6142a001
--- /dev/null
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_phar_psr4.php
@@ -0,0 +1,13 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Sit\\' => array('phar://' . $vendorDir . '/a/a/dir/sit.phar/src'),
+    'Qux\\' => array('phar://' . $baseDir . '/dir/qux.phar/src'),
+    'Dolor\\' => array('phar://' . $vendorDir . '/a/a/dolor.phar'),
+    'Baz\\' => array('phar://' . $baseDir . '/baz.phar'),
+);
diff --git a/tests/Composer/Test/Autoload/Fixtures/autoload_phar_static.php b/tests/Composer/Test/Autoload/Fixtures/autoload_phar_static.php
new file mode 100644
index 000000000..486a5c0dc
--- /dev/null
+++ b/tests/Composer/Test/Autoload/Fixtures/autoload_phar_static.php
@@ -0,0 +1,87 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitPhar
+{
+    public static $prefixLengthsPsr4 = array (
+        'S' => 
+        array (
+            'Sit\\' => 4,
+        ),
+        'Q' => 
+        array (
+            'Qux\\' => 4,
+        ),
+        'D' => 
+        array (
+            'Dolor\\' => 6,
+        ),
+        'B' => 
+        array (
+            'Baz\\' => 4,
+        ),
+    );
+
+    public static $prefixDirsPsr4 = array (
+        'Sit\\' => 
+        array (
+            0 => 'phar://' . __DIR__ . '/..' . '/a/a/dir/sit.phar/src',
+        ),
+        'Qux\\' => 
+        array (
+            0 => 'phar://' . __DIR__ . '/../..' . '/dir/qux.phar/src',
+        ),
+        'Dolor\\' => 
+        array (
+            0 => 'phar://' . __DIR__ . '/..' . '/a/a/dolor.phar',
+        ),
+        'Baz\\' => 
+        array (
+            0 => 'phar://' . __DIR__ . '/../..' . '/baz.phar',
+        ),
+    );
+
+    public static $prefixesPsr0 = array (
+        'L' => 
+        array (
+            'Lorem' => 
+            array (
+                0 => 'phar://' . __DIR__ . '/..' . '/a/a/lorem.phar',
+            ),
+        ),
+        'I' => 
+        array (
+            'Ipsum' => 
+            array (
+                0 => 'phar://' . __DIR__ . '/..' . '/a/a/dir/ipsum.phar/src',
+            ),
+        ),
+        'F' => 
+        array (
+            'Foo' => 
+            array (
+                0 => 'phar://' . __DIR__ . '/../..' . '/foo.phar',
+            ),
+        ),
+        'B' => 
+        array (
+            'Bar' => 
+            array (
+                0 => 'phar://' . __DIR__ . '/../..' . '/dir/bar.phar/src',
+            ),
+        ),
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixLengthsPsr4 = ComposerStaticInitPhar::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInitPhar::$prefixDirsPsr4;
+            $loader->prefixesPsr0 = ComposerStaticInitPhar::$prefixesPsr0;
+
+        }, null, ClassLoader::class);
+    }
+}