diff --git a/samples/gltf_viewer.cpp b/samples/gltf_viewer.cpp
index 498c4e495e..d8ca070626 100644
--- a/samples/gltf_viewer.cpp
+++ b/samples/gltf_viewer.cpp
@@ -312,8 +312,7 @@ static void createGroundPlane(Engine* engine, Scene* scene, App& app) {
     Entity groundPlane = em.create();
     RenderableManager::Builder(1)
             .boundingBox({
-                { -planeExtent.x, 0, -planeExtent.z },
-                { planeExtent.x, 1e-4f, planeExtent.z }
+                    {}, { planeExtent.x, 1e-4f, planeExtent.z }
             })
             .material(0, shadowMaterial->getDefaultInstance())
             .geometry(0, RenderableManager::PrimitiveType::TRIANGLES,