diff --git a/apps/openmw/mwmechanics/obstacle.cpp b/apps/openmw/mwmechanics/obstacle.cpp
index 63167e302..c8b548bad 100644
--- a/apps/openmw/mwmechanics/obstacle.cpp
+++ b/apps/openmw/mwmechanics/obstacle.cpp
@@ -2,8 +2,6 @@
 
 #include <components/sceneutil/positionattitudetransform.hpp>
 
-#include "../mwbase/world.hpp"
-#include "../mwbase/environment.hpp"
 #include "../mwworld/class.hpp"
 #include "../mwworld/cellstore.hpp"
 
@@ -125,17 +123,15 @@ namespace MWMechanics
      */
     void ObstacleCheck::update(const MWWorld::Ptr& actor, float duration)
     {
-        const ESM::Position pos = actor.getRefData().getPosition();
+        const MWWorld::Class& cls = actor.getClass();
+        ESM::Position pos = actor.getRefData().getPosition();
 
-        if (mDistSameSpot == -1)
-        {
-            const osg::Vec3f halfExtents = MWBase::Environment::get().getWorld()->getHalfExtents(actor);
-            mDistSameSpot = DIST_SAME_SPOT * actor.getClass().getSpeed(actor) + 1.2 * std::max(halfExtents.x(), halfExtents.y());
-        }
+        if(mDistSameSpot == -1)
+            mDistSameSpot = DIST_SAME_SPOT * cls.getSpeed(actor);
+
+        float distSameSpot = mDistSameSpot * duration;
 
-        const float distSameSpot = mDistSameSpot * duration;
-        const float squaredMovedDistance = (osg::Vec2f(pos.pos[0], pos.pos[1]) - osg::Vec2f(mPrevX, mPrevY)).length2();
-        const bool samePosition = squaredMovedDistance < distSameSpot * distSameSpot;
+        bool samePosition =  (osg::Vec2f(pos.pos[0], pos.pos[1]) - osg::Vec2f(mPrevX, mPrevY)).length2() <  distSameSpot * distSameSpot;
 
         // update position
         mPrevX = pos.pos[0];