diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index 16bc7e9..b34919e 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -172,6 +172,10 @@ interface ModelStore {
 
   scaleRatio: ScaleRatio;
   setScaleRatio: (r: ScaleRatio) => void;
+  /** Incremented whenever the user asks to reset the AR scale; XRGrabbable
+   *  watches this and snaps its group.scale back to 1. */
+  scaleResetNonce: number;
+  resetScale: () => void;
 
   opacity: number;
   setOpacity: (opacity: number) => void;