diff --git a/lib/level/grid/base.lua b/lib/level/grid/base.lua
index cac376d..6ed53ec 100644
--- a/lib/level/grid/base.lua
+++ b/lib/level/grid/base.lua
@@ -8,7 +8,7 @@ grid.__index = grid
 --- adds a value to the grid
 --- @param value any
 function grid:add(value)
-    grid[tostring(value.position)] = value
+    self.__grid[tostring(value.position)] = value
 end
 
 --- @param position Vec3