diff --git a/src/Bridges/ApplicationDI/LatteExtension.php b/src/Bridges/ApplicationDI/LatteExtension.php
index bebe82bb7..c9f177c4b 100644
--- a/src/Bridges/ApplicationDI/LatteExtension.php
+++ b/src/Bridges/ApplicationDI/LatteExtension.php
@@ -39,7 +39,7 @@ public function getConfigSchema(): Nette\Schema\Schema
 	{
 		return Expect::structure([
 			'debugger' => Expect::anyOf(true, false, 'all'),
-			'xhtml' => Expect::bool(false),
+			'xhtml' => Expect::bool(false)->deprecated(),
 			'macros' => Expect::arrayOf('string'),
 			'templateClass' => Expect::string(),
 			'strictTypes' => Expect::bool(false),