diff --git a/core/modules/big_pipe/js/big_pipe.js b/core/modules/big_pipe/js/big_pipe.js
index 64a1bb95182b7d2c72f78bc66240c2bacef8f750..5d592e72f16bf1073555287746229311748f2395 100644
--- a/core/modules/big_pipe/js/big_pipe.js
+++ b/core/modules/big_pipe/js/big_pipe.js
@@ -89,8 +89,7 @@
    */
   function checkMutation(node) {
     return Boolean(
-      node &&
-        node.nodeType === Node.ELEMENT_NODE &&
+      node.nodeType === Node.ELEMENT_NODE &&
         node.nodeName === 'SCRIPT' &&
         node.dataset &&
         node.dataset.bigPipeReplacementForPlaceholderWithId &&