diff --git a/system/src/Grav/Common/Assets.php b/system/src/Grav/Common/Assets.php
index b14ba7233..b63de9c72 100644
--- a/system/src/Grav/Common/Assets.php
+++ b/system/src/Grav/Common/Assets.php
@@ -301,7 +301,9 @@ class Assets
      */
     public function addInlineCss($asset, $priority = 10)
     {
-        $asset = (string) $asset;
+        if (is_a($asset, 'Twig_Markup')) {
+            $asset = strip_tags((string)$asset);
+        }
         $key = md5($asset);
         if (is_string($asset) && !array_key_exists($key, $this->inline_css)) {
             $this->inline_css[$key] = [
@@ -327,7 +329,9 @@ class Assets
      */
     public function addInlineJs($asset, $priority = 10)
     {
-        $asset = (string) $asset;
+        if (is_a($asset, 'Twig_Markup')) {
+            $asset = strip_tags((string)$asset);
+        }
         $key = md5($asset);
         if (is_string($asset) && !array_key_exists($key, $this->inline_js)) {
             $this->inline_js[$key] = [