diff --git a/src/DI/Helpers.php b/src/DI/Helpers.php
index 9e20c5434..3384a3408 100644
--- a/src/DI/Helpers.php
+++ b/src/DI/Helpers.php
@@ -34,7 +34,11 @@ public static function expand($var, array $params, $recursive = false)
 		if (is_array($var)) {
 			$res = [];
 			foreach ($var as $key => $val) {
-				$res[$key] = self::expand($val, $params, $recursive);
+				if (is_int($key) && is_string($val) && preg_match('#^\.\.\.(%[\w.-]*%)\z#i', $val, $matches)) {
+					$res = array_merge($res, self::expand($matches[1], $params, $recursive));
+				} else {
+					$res[$key] = self::expand($val, $params, $recursive);
+				}
 			}
 			return $res;
 
diff --git a/tests/DI/Compiler.parameters.spread.phpt b/tests/DI/Compiler.parameters.spread.phpt
new file mode 100644
index 000000000..234d12ffc
--- /dev/null
+++ b/tests/DI/Compiler.parameters.spread.phpt
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * Test: Nette\DI\Compiler: spread operator
+ */
+
+declare(strict_types = 1);
+
+use Nette\DI;
+use Tester\Assert;
+
+
+require __DIR__ . '/../bootstrap.php';
+
+
+class DbConnection
+{
+
+	/** @var array */
+	public $config;
+
+
+	public function __construct(array $config)
+	{
+		$this->config = $config;
+	}
+}
+
+
+$container = createContainer(new DI\Compiler, '
+parameters:
+	connection:
+		username: root
+		password: 123
+	connection2:
+		- ...%connection%
+		database: app
+services:
+	connection: DbConnection([timezone: utc, ...%connection2%])
+	');
+
+
+Assert::same([
+	'username' => 'root',
+	'password' => 123,
+	'database' => 'app',
+], $container->getParameters()['connection2']);
+
+/** @var DbConnection $connection */
+$connection = $container->getService('connection');
+Assert::same([
+	'timezone' => 'utc',
+	'username' => 'root',
+	'password' => 123,
+	'database' => 'app',
+], $connection->config);