diff --git a/src/devkit/SceneStatsProbe.tsx b/src/devkit/SceneStatsProbe.tsx
index b19179a..294c6cc 100644
--- a/src/devkit/SceneStatsProbe.tsx
+++ b/src/devkit/SceneStatsProbe.tsx
@@ -35,9 +35,8 @@ export function SceneStatsProbe() {
 
     if (frame) {
       try {
-        // @ts-expect-error detectedPlanes is experimental
-        const planes = frame.detectedPlanes;
-        sceneStats.xrPlanesCount = planes ? (planes.size ?? planes.length ?? 0) : 0;
+        const planes = (frame as unknown as { detectedPlanes?: { size?: number } }).detectedPlanes;
+        sceneStats.xrPlanesCount = planes?.size ?? 0;
       } catch { sceneStats.xrPlanesCount = 0; }
       sceneStats.xrInputCount = frame.session?.inputSources?.length ?? 0;
     }