diff --git a/backend/export.py b/backend/export.py
index cdc7e78..3f104d3 100644
--- a/backend/export.py
+++ b/backend/export.py
@@ -813,7 +813,7 @@ def generate_export_html(
         // nested in a callout blockquote lose their `> ` prefix on the closer
         // — otherwise the restored block sits inside <div class="callout-body">
         // without a valid CommonMark fence closer and runs unclosed.
-        // Fence-aware so literal `> [!TIPO]` inside a top-level code block
+        // Fence-aware so literal `> [!TIP]` inside a top-level code block
         // is not misread. Mirrors the in-app preview preprocessor.
         let processed;
         {{
diff --git a/frontend/app.js b/frontend/app.js
index 965cc47..a520819 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -5839,7 +5839,7 @@ function noteApp() {
             // fences nested in a callout blockquote lose their `> ` prefix on
             // the closer — otherwise CommonMark won't see a valid fence closer
             // once restored inside <div class="callout-body"> and the block
-            // runs unclosed. Fence-aware so `> [!TIPO]` literal inside a
+            // runs unclosed. Fence-aware so `> [!TIP]` literal inside a
             // top-level code block is not misread as a callout.
             {
                 const CALLOUT_RE = /^>\s*\[!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)\]\s*(.*)$/i;