diff --git a/packages/shared/config/constant.ts b/packages/shared/config/constant.ts
index 2ed5dbc7cc..fc118b6b87 100644
--- a/packages/shared/config/constant.ts
+++ b/packages/shared/config/constant.ts
@@ -193,6 +193,7 @@ const textExtsByCategory = new Map([
       '.htm',
       '.xhtml', // HTML
       '.xml', // XML
+      '.fxml', // JavaFX XML
       '.org', // Org-mode
       '.wiki', // Wiki
       '.tex',