diff --git a/packages/nodes/src/wall/tool.tsx b/packages/nodes/src/wall/tool.tsx
index 530472ec1..7b2e0c9c6 100644
--- a/packages/nodes/src/wall/tool.tsx
+++ b/packages/nodes/src/wall/tool.tsx
@@ -542,7 +542,7 @@ export const WallTool: React.FC = () => {
         // BoxGeometry stays visible for a frame on top of the
         // freshly-committed real wall, producing a brief
         // double-paint at the new wall's position.
-        wallPreviewRef.current.visible = false
+        if (wallPreviewRef.current) wallPreviewRef.current.visible = false
         setDraftMeasurement(null)
       }
     }