diff --git a/typo3/sysext/core/Classes/Page/PageRenderer.php b/typo3/sysext/core/Classes/Page/PageRenderer.php
index 9fafb7a36aeb88d1f4705ca7832b337e645520e6..51faa1c6597aca43d194890fc2fb3f0882acbbce 100644
--- a/typo3/sysext/core/Classes/Page/PageRenderer.php
+++ b/typo3/sysext/core/Classes/Page/PageRenderer.php
@@ -2774,6 +2774,7 @@ class PageRenderer implements \TYPO3\CMS\Core\SingletonInterface
                 'jsFooterLibs' => &$this->jsFooterLibs,
                 'jsFiles' => &$this->jsFiles,
                 'jsFooterFiles' => &$this->jsFooterFiles,
+                'cssLibs' => &$this->cssLibs,
                 'cssFiles' => &$this->cssFiles,
                 'headerData' => &$this->headerData,
                 'footerData' => &$this->footerData,
@@ -2800,6 +2801,7 @@ class PageRenderer implements \TYPO3\CMS\Core\SingletonInterface
                 'jsFooterLibs' => &$this->jsFooterLibs,
                 'jsFiles' => &$this->jsFiles,
                 'jsFooterFiles' => &$this->jsFooterFiles,
+                'cssLibs' => &$this->cssLibs,
                 'cssFiles' => &$this->cssFiles,
                 'headerData' => &$this->headerData,
                 'footerData' => &$this->footerData,