diff --git a/assets/js/theme.js b/assets/js/theme.js
index 84a9e578..d28d779c 100644
--- a/assets/js/theme.js
+++ b/assets/js/theme.js
@@ -377,7 +377,8 @@ class FixIt {
       $preChroma.parentElement.replaceChild($chroma, $preChroma);
       $td.appendChild($preChroma);
     });
-    this.util.forEach(document.querySelectorAll('.highlight > .chroma:not(:has(.code-header))'), ($chroma) => {
+    this.util.forEach(document.querySelectorAll('.highlight > .chroma:not([data-init])'), ($chroma) => {
+      $chroma.dataset.init = 'true';
       const $codeElements = $chroma.querySelectorAll('pre.chroma > code');
       if ($codeElements.length) {
         const $code = $codeElements[$codeElements.length - 1];