diff --git a/balloon.lua b/balloon.lua
index 57ddaf0..a66f768 100644
--- a/balloon.lua
+++ b/balloon.lua
@@ -153,12 +153,12 @@ end
 
 function me.on_step(self, dtime, moveresult)
     local exit = false
-    local ctrl = nil
+    local pi = nil
     -- allow to exit
     if self._driver and self._driver:is_player() then
         local name = self._driver:get_player_name()
-        ctrl = player_info.p[name]
-        exit = ctrl.just_pressed.sneak
+        pi = player_info.p[name]
+        exit = pi.just_pressed.sneak
     end
     if exit then
         me.detach(self)
@@ -175,13 +175,13 @@ function me.on_step(self, dtime, moveresult)
 	local in_water = minetest.get_item_group(minetest.get_node(p).name, "liquid") ~= 0
 	local on_water = (minetest.get_item_group(minetest.get_node(vector.offset(p, 0, -0.2, 0)).name, "liquid") ~= 0 and not in_water)
 
-    if ctrl then
-        if ctrl.ctrl.up then forward = 1
-        elseif ctrl.ctrl.down then forward = -1 end
-        if ctrl.ctrl.jump then climb = 1
-        elseif ctrl.ctrl.aux1 then climb = -1 end
-        if ctrl.ctrl.right then right = 1
-        elseif ctrl.ctrl.left then right = -1 end
+    if pi then
+        if pi.ctrl.up then forward = 1
+        elseif pi.ctrl.down then forward = -1 end
+        if pi.ctrl.jump then climb = 1
+        elseif pi.ctrl.aux1 then climb = -1 end
+        if pi.ctrl.right then right = 1
+        elseif pi.ctrl.left then right = -1 end
         local yaw = self.object:get_yaw()
         local dir = minetest.yaw_to_dir(yaw)
         self.object:set_yaw(yaw - right * dtime)