diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index 9fa1ffa..5d9c785 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -1264,6 +1264,7 @@ export function ModelViewerCanvas({ url }: ModelViewerProps) {
 
       <GridLayer />
       <GridAutoFollower />
+      <GridCalibrationHandler />
 
       <PositionDragHandler />
       <SelectionHandler />