diff --git a/gamecore/modules/world/actors/actor2D.lua b/gamecore/modules/world/actors/actor2D.lua
index 508d88c..af1ec70 100644
--- a/gamecore/modules/world/actors/actor2D.lua
+++ b/gamecore/modules/world/actors/actor2D.lua
@@ -59,15 +59,6 @@ function Actor2D:setBounceFactor(newBounceFactor)
   self.bounceFactor = newBounceFactor or 0
 end
 
--- UPDATE FUNCTIONS
--- Theses functions are activated every steps
-
-function Actor2D:update(dt)
-  self:updateTimers(dt)
-  self:autoMove(dt)
-  self:updateSprite(dt)
-end
-
 -- MOVEMENT FUNCTIONS
 -- Basic functions from the movement.
 
diff --git a/gamecore/modules/world/actors/baseactor.lua b/gamecore/modules/world/actors/baseactor.lua
index 6cbef3b..7f91ac9 100644
--- a/gamecore/modules/world/actors/baseactor.lua
+++ b/gamecore/modules/world/actors/baseactor.lua
@@ -64,6 +64,21 @@ function BaseActor:destroy()
   self.isDestroyed = true
 end
 
+-- UPDATE FUNCTIONS
+-- Theses functions are activated every steps
+
+function BaseActor:update(dt)
+  self:updateTimers(dt)
+  self:autoMove(dt)
+  self:updateSprite(dt)
+end
+
+function BaseActor:autoMove(dt)
+  -- The base actor don't have coordinate
+  -- so the autoMove is only usefull to its
+  -- 2D and 3D childrens
+end
+
 -- INPUT FUNCTIONS
 -- get input from the world object