diff --git a/systems/collision-detection.lua b/systems/collision-detection.lua
index e75f24e..f0c7613 100644
--- a/systems/collision-detection.lua
+++ b/systems/collision-detection.lua
@@ -1,4 +1,5 @@
 local world = require("world")
+local band = bit.band
 
 local collidingEntities = world:filteredSystem("collidingEntitites", {
     position = T.XyPair,
@@ -31,7 +32,7 @@ world:filteredSystem(
                 (e ~= collider)
                 and collider.canCollideWith
                 and e.canBeCollidedBy
-                and bit.band(collider.canCollideWith, e.canBeCollidedBy) ~= 0
+                and band(collider.canCollideWith, e.canBeCollidedBy) ~= 0
                 and intersects(e, collider) then
                     system.world:addEntity({
                         collisionBetween = { collider = collider, collidedInto = e },