diff --git a/src/ClassMapAutoloader.php b/src/ClassMapAutoloader.php
index f5d2770..8b57b5a 100644
--- a/src/ClassMapAutoloader.php
+++ b/src/ClassMapAutoloader.php
@@ -134,16 +134,17 @@ public function getAutoloadMap()
     }
 
     /**
-     * Defined by Autoloadable
-     *
-     * @param  string $class
-     * @return void
+     * {@inheritDoc}
      */
     public function autoload($class)
     {
         if (isset($this->map[$class])) {
             require_once $this->map[$class];
+
+            return $class;
         }
+
+        return false;
     }
 
     /**
diff --git a/test/ClassMapAutoloaderTest.php b/test/ClassMapAutoloaderTest.php
index 4872032..a6c5b51 100644
--- a/test/ClassMapAutoloaderTest.php
+++ b/test/ClassMapAutoloaderTest.php
@@ -147,7 +147,8 @@ public function testAutoloadLoadsClasses()
     {
         $map = array('ZendTest\UnusualNamespace\ClassMappedClass' => __DIR__ . '/TestAsset/ClassMappedClass.php');
         $this->loader->registerAutoloadMap($map);
-        $this->loader->autoload('ZendTest\UnusualNamespace\ClassMappedClass');
+        $loaded = $this->loader->autoload('ZendTest\UnusualNamespace\ClassMappedClass');
+        $this->assertSame('ZendTest\UnusualNamespace\ClassMappedClass', $loaded);
         $this->assertTrue(class_exists('ZendTest\UnusualNamespace\ClassMappedClass', false));
     }
 
@@ -155,7 +156,7 @@ public function testIgnoresClassesNotInItsMap()
     {
         $map = array('ZendTest\UnusualNamespace\ClassMappedClass' => __DIR__ . '/TestAsset/ClassMappedClass.php');
         $this->loader->registerAutoloadMap($map);
-        $this->loader->autoload('ZendTest\UnusualNamespace\UnMappedClass');
+        $this->assertFalse($this->loader->autoload('ZendTest\UnusualNamespace\UnMappedClass'));
         $this->assertFalse(class_exists('ZendTest\UnusualNamespace\UnMappedClass', false));
     }
 
@@ -172,7 +173,8 @@ public function testCanLoadClassMapFromPhar()
     {
         $map = 'phar://' . __DIR__ . '/_files/classmap.phar/test/.//../autoload_classmap.php';
         $this->loader->registerAutoloadMap($map);
-        $this->loader->autoload('some\loadedclass');
+        $loaded = $this->loader->autoload('some\loadedclass');
+        $this->assertSame('some\loadedclass', $loaded);
         $this->assertTrue(class_exists('some\loadedclass', false));
 
         // will not register duplicate, even with a different relative path