diff --git a/src/RobotLoader/RobotLoader.php b/src/RobotLoader/RobotLoader.php
index ae1306e..72392ee 100644
--- a/src/RobotLoader/RobotLoader.php
+++ b/src/RobotLoader/RobotLoader.php
@@ -118,11 +118,13 @@ public function tryLoad($type)
 	public function addDirectory($path)
 	{
 		foreach ((array) $path as $val) {
-			$real = realpath($val);
-			if ($real === FALSE) {
+			if (strncasecmp($val, 'phar://', 7) === 0 && file_exists($val)) {
+				$this->scanDirs[] = $val;
+			} elseif (($real = realpath($val)) === FALSE) {
 				throw new Nette\DirectoryNotFoundException("Directory '$val' not found.");
+			} else {
+				$this->scanDirs[] = $real;
 			}
-			$this->scanDirs[] = $real;
 		}
 		return $this;
 	}
diff --git a/tests/Loaders/RobotLoader.phar.phpt b/tests/Loaders/RobotLoader.phar.phpt
new file mode 100644
index 0000000..172b918
--- /dev/null
+++ b/tests/Loaders/RobotLoader.phar.phpt
@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * Test: Nette\Loaders\RobotLoader loading from PHAR.
+ *
+ * @phpIni phar.readonly=0
+ */
+
+use Nette\Loaders\RobotLoader,
+	Nette\Caching\Storages\DevNullStorage,
+	Tester\Assert;
+
+
+require __DIR__ . '/../bootstrap.php';
+
+$pharFile = TEMP_DIR . '/test.phar';
+
+$phar = new Phar($pharFile);
+$phar['class.A.php'] = '<?php class A {}';
+$phar['class.B.php'] = '<?php class B {}';
+$phar['class.C.php'] = '<?php class C {}';
+$phar['sub/class.D.php'] = '<?php class D {}';
+$phar->setStub('<?php __HALT_COMPILER();');
+unset($phar);
+
+Assert::true( is_file($pharFile) );
+
+
+$loader = new RobotLoader;
+$loader->setCacheStorage(new DevNullStorage);
+$loader->addDirectory("phar://$pharFile/sub");
+$loader->addDirectory("PHAR://$pharFile/class.B.php");
+Phar::loadPhar($pharFile, 'test.phar');
+$loader->addDirectory("phar://test.phar/class.C.php");
+$loader->register();
+
+Assert::false( class_exists('A') );
+Assert::true( class_exists('B') );
+Assert::true( class_exists('C') );
+Assert::true( class_exists('D') );
+
+
+Assert::exception(function() use ($loader, $pharFile) {
+	$loader->addDirectory("phar://$pharFile/non-dir");
+}, 'Nette\DirectoryNotFoundException', "Directory 'phar://$pharFile/non-dir' not found.");
+
+Assert::exception(function() use ($loader, $pharFile) {
+	$loader->addDirectory("phar://$pharFile/non-file.php");
+}, 'Nette\DirectoryNotFoundException', "Directory 'phar://$pharFile/non-file.php' not found.");