diff --git a/src/public/app/services/library_loader.js b/src/public/app/services/library_loader.js
index 4fcafa577..9442d8b49 100644
--- a/src/public/app/services/library_loader.js
+++ b/src/public/app/services/library_loader.js
@@ -68,6 +68,9 @@ const EXCALIDRAW = {
 };
 
 const EXCALIDRAW_UTILS = {
+    /**
+     * FIXME: excalidraw-utils does not render pen-background. maybe own built required?
+     */
     js: [
         "node_modules/@excalidraw/utils/dist/excalidraw-utils.min.js", //v0.1.2
     ]