diff --git a/modules/csg/csg_shape.cpp b/modules/csg/csg_shape.cpp
index 13226a8395e3..49900e604111 100644
--- a/modules/csg/csg_shape.cpp
+++ b/modules/csg/csg_shape.cpp
@@ -220,6 +220,7 @@ void CSGShape3D::_make_dirty(bool p_parent_removing) {
 #ifndef PHYSICS_3D_DISABLED
 	if ((p_parent_removing || is_root_shape()) && !dirty) {
 		callable_mp(this, &CSGShape3D::update_shape).call_deferred(); // Must be deferred; otherwise, is_root_shape() will use the previous parent.
+		dirty = true;
 	}
 #endif // PHYSICS_3D_DISABLED