diff --git a/modules/gridmap/grid_map.h b/modules/gridmap/grid_map.h
index e05979efbc..348ac5194c 100644
--- a/modules/gridmap/grid_map.h
+++ b/modules/gridmap/grid_map.h
@@ -155,7 +155,6 @@ class GridMap : public Node3D {
 	Ref<PhysicsMaterial> physics_material;
 	bool bake_navigation = false;
 	RID map_override;
-	uint32_t navigation_layers = 1;
 
 	Transform3D last_transform;