diff --git a/automobiles_buggy/buggy_entities.lua b/automobiles_buggy/buggy_entities.lua
index 71947db..0b5e033 100755
--- a/automobiles_buggy/buggy_entities.lua
+++ b/automobiles_buggy/buggy_entities.lua
@@ -451,6 +451,7 @@ minetest.register_entity("automobiles_buggy:buggy", {
             later_speed*buggy.LATER_DRAG_FACTOR*-1*automobiles_lib.sign(later_speed))
 
         local accel = vector.add(longit_drag,later_drag)
+        local stop = nil
 
         if self._show_rag == true then
             self.rag:set_properties({is_visible=true})
diff --git a/automobiles_coupe/coupe_entities.lua b/automobiles_coupe/coupe_entities.lua
index 0465648..5b178f1 100755
--- a/automobiles_coupe/coupe_entities.lua
+++ b/automobiles_coupe/coupe_entities.lua
@@ -459,6 +459,7 @@ minetest.register_entity("automobiles_coupe:coupe", {
             later_speed*coupe.LATER_DRAG_FACTOR*-1*automobiles_lib.sign(later_speed))
 
         local accel = vector.add(longit_drag,later_drag)
+        local stop = nil
 
         local player = nil
         local is_attached = false
diff --git a/automobiles_motorcycle/motorcycle_entities.lua b/automobiles_motorcycle/motorcycle_entities.lua
index 7e1acac..efd8d31 100755
--- a/automobiles_motorcycle/motorcycle_entities.lua
+++ b/automobiles_motorcycle/motorcycle_entities.lua
@@ -262,6 +262,7 @@ minetest.register_entity("automobiles_motorcycle:motorcycle", {
             later_speed*motorcycle.LATER_DRAG_FACTOR*-1*automobiles_lib.sign(later_speed))
 
         local accel = vector.add(longit_drag,later_drag)
+        local stop = nil
 
         local player = nil
         local is_attached = false
diff --git a/automobiles_roadster/roadster_entities.lua b/automobiles_roadster/roadster_entities.lua
index c5d84e0..a3191ef 100755
--- a/automobiles_roadster/roadster_entities.lua
+++ b/automobiles_roadster/roadster_entities.lua
@@ -432,6 +432,7 @@ minetest.register_entity("automobiles_roadster:roadster", {
             later_speed*roadster.LATER_DRAG_FACTOR*-1*automobiles_lib.sign(later_speed))
 
         local accel = vector.add(longit_drag,later_drag)
+        local stop = nil
 
         if self._show_rag == true then
             self.object:set_bone_position("windshield", {x=0, y=15.8317, z=15.0394}, {x=0, y=0, z=0})