diff --git a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
index fdf4fa1f4c887..9add847acb111 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
@@ -676,7 +676,7 @@ private function shouldEnableEntityLoader(): bool
             });
             $schema = '<?xml version="1.0" encoding="utf-8"?>
 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
-  <xsd:include schemaLocation="file:///'.str_replace('\\', '/', $tmpfile).'" />
+  <xsd:include schemaLocation="file:///'.rawurlencode(str_replace('\\', '/', $tmpfile)).'" />
 </xsd:schema>';
             file_put_contents($tmpfile, '<?xml version="1.0" encoding="utf-8"?>
 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">