diff --git a/src/pages/XRSession.tsx b/src/pages/XRSession.tsx
index 23b0d01..7abd1b7 100644
--- a/src/pages/XRSession.tsx
+++ b/src/pages/XRSession.tsx
@@ -172,9 +172,13 @@ function XRActiveModel() {
 function ControllerFineTuning({ freeMove }: { freeMove: boolean }) {
   const { setFineTuning } = useModelStore();
   const session = useXR((s) => s.session);
+  const isActiveLocked = useModelStore((s) => {
+    const a = s.models.find(m => m.id === s.activeModelId);
+    return !!a?.locked;
+  });
 
   useFrame(() => {
-    if (!session) return;
+    if (!session || isActiveLocked) return;
     const inputSources = session.inputSources;
     if (!inputSources) return;