diff --git a/src/pages/Index.tsx b/src/pages/Index.tsx
index f428a0f..315f807 100644
--- a/src/pages/Index.tsx
+++ b/src/pages/Index.tsx
@@ -13,6 +13,7 @@ const Index = () => {
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [loadingDemo, setLoadingDemo] = useState(false);
   const [loadingDemoIFC, setLoadingDemoIFC] = useState(false);
+  const [loadingDemoCotovelo, setLoadingDemoCotovelo] = useState(false);
   const [converting, setConverting] = useState(false);
   const { model, setModel, xrSupported, setXrSupported } = useModelStore();