diff --git a/event.lua b/event.lua
index e518d40..fe294eb 100644
--- a/event.lua
+++ b/event.lua
@@ -1,9 +1,6 @@
 -- ubiquitousse.event
 local uqt = require((...):match("^(.-ubiquitousse)%."))
 local m = uqt.module
-local input = uqt.input
-local time = uqt.time
-local scene = uqt.scene
 
 --- The events: callback functions that will be called when something interesting occurs.
 -- Theses are expected to be redefined in the game.
@@ -18,15 +15,15 @@ return {
 	-- @tparam number dt time since last call, in miliseconds
 	-- @impl mixed
 	update = function(dt)
-		if m.input then input.update(dt) end
-		if m.time then time.update(dt) end
-		if m.scene then scene.update(dt) end
+		if m.input then uqt.input.update(dt) end
+		if m.time then uqt.time.update(dt) end
+		if m.scene then uqt.scene.update(dt) end
 	end,
 
 	--- Called each time the game expect a new frame to be drawn.
 	-- The screen is expected to be cleared since last frame.
 	-- @impl backend
 	draw = function()
-		if m.scene then scene.draw() end
+		if m.scene then uqt.scene.draw() end
 	end
 }
diff --git a/input.lua b/input.lua
index 080ce34..eb23060 100644
--- a/input.lua
+++ b/input.lua
@@ -1,6 +1,5 @@
 -- ubiquitousse.input
 local uqt = require((...):match("^(.-ubiquitousse)%."))
-local draw = uqt.draw
 
 --- Used to store inputs which were updated this frame
 -- { Input: true, ... }
@@ -263,6 +262,7 @@ input = {
 	-- @tretrun PointerInput the object
 	-- @impl ubiquitousse
 	pointer = function(...)
+		local draw = uqt.draw -- requires width and height
 		local pointers = {} -- pointers list
 		local x, y = 0, 0 -- pointer position
 		local width, height = 1, 1 -- half-dimensions of the movement area
diff --git a/scene.lua b/scene.lua
index 8099a05..6b96993 100644
--- a/scene.lua
+++ b/scene.lua
@@ -1,7 +1,6 @@
 -- ubiquitousse.scene
 local uqt = require((...):match("^(.-ubiquitousse)%."))
 local m = uqt.module
-local time = uqt.time
 
 --- Returns the file path of the given module name.
 local function getPath(modname)
@@ -53,7 +52,7 @@ scene = {
 		return {
 			name = name or "unamed", -- The scene name.
 
-			time = m.time and time.new(), -- Scene-specific TimerRegistry, if uqt.time is enabled.
+			time = m.time and uqt.time.new(), -- Scene-specific TimerRegistry, if uqt.time is enabled.
 
 			enter = function(self, ...) end, -- Called when entering a scene.
 			exit = function(self) end, -- Called when exiting a scene, and not expecting to come back (scene may be unloaded).