diff --git a/server/rehype-hljs-var.ts b/server/rehype-hljs-var.ts
index 2fa08ad0aa..ad31f9b236 100644
--- a/server/rehype-hljs-var.ts
+++ b/server/rehype-hljs-var.ts
@@ -138,7 +138,7 @@ export const rehypeVarInHLJS = (
         // can tell whether a given index falls within a placeholder.
         const placeholderIndices = new Map();
         placeholders.forEach((p) => {
-          placeholderIndices.set(p.index, p);
+          placeholderIndices.set(p.index, p[0]);
         });
 
         let valueIdx = 0;
@@ -146,7 +146,8 @@ export const rehypeVarInHLJS = (
           // The current index is in a placeholder, so add the original Var
           // component to newChildren.
           if (placeholderIndices.has(valueIdx)) {
-            const placeholder = valueIdx + placeholderIndices.get(valueIdx);
+            const placeholder = placeholderIndices.get(valueIdx);
+            console.log("placeholder:", placeholder);
             valueIdx += placeholder.length;
             newChildren.push(placeholdersToVars[placeholder]);
             continue;