diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index d469a08..3f1e0ef 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -92,6 +92,9 @@ interface ModelStore {
   xrSupported: boolean | null;
   setXrSupported: (supported: boolean | null) => void;
 
+  scaleRatio: ScaleRatio;
+  setScaleRatio: (r: ScaleRatio) => void;
+
   opacity: number;
   setOpacity: (opacity: number) => void;