diff --git a/player.lua b/player.lua
index b4d9235..12f9762 100644
--- a/player.lua
+++ b/player.lua
@@ -1,6 +1,6 @@
 Player = Object:extend()
-cos = math.cos
-sin = math.sin --optimisation
+local cos = math.cos
+local sin = math.sin --optimisation
 
 -- Constructor for the Player class
 function Player:new(p, x, y, health, image, speed)