diff --git a/apps/openmw/mwmechanics/aisequence.cpp b/apps/openmw/mwmechanics/aisequence.cpp
index a798040fe6..940002a573 100644
--- a/apps/openmw/mwmechanics/aisequence.cpp
+++ b/apps/openmw/mwmechanics/aisequence.cpp
@@ -82,7 +82,8 @@ void MWMechanics::AiSequence::execute (const MWWorld::Ptr& actor)
                 +(actorpos.pos[2] - playerpos.pos[2])*(actorpos.pos[2] - playerpos.pos[2]));
             float fight = actor.getClass().getCreatureStats(actor).getAiSetting(1);
             float disp = MWBase::Environment::get().getMechanicsManager()->getDerivedDisposition(actor);
-            if(fight == 100
+            bool LOS = MWBase::Environment::get().getWorld()->getLOS(actor,MWBase::Environment::get().getWorld()->getPlayer().getPlayer());
+            if(  ( (fight == 100 ) 
                 || (fight >= 95 && d <= 3000)
                 || (fight >= 90 && d <= 2000)
                 || (fight >= 80 && d <= 1000)
@@ -90,7 +91,8 @@ void MWMechanics::AiSequence::execute (const MWWorld::Ptr& actor)
                 || (fight >= 70 && disp <= 35 && d <= 1000) 
                 || (fight >= 60 && disp <= 30 && d <= 1000) 
                 || (fight >= 50 && disp == 0) 
-                || (fight >= 40 && disp <= 10 && d <= 500) 
+                || (fight >= 40 && disp <= 10 && d <= 500) )
+                && LOS
                 )
             {
                 mCombat = true;
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index 724972600a..b6d6cc2d8a 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -1786,6 +1786,16 @@ namespace MWWorld
 
     bool World::getLOS(const MWWorld::Ptr& npc,const MWWorld::Ptr& targetNpc)
     {
+        Ogre::Vector3 halfExt1 = mPhysEngine->getCharacter(npc.getRefData().getHandle())->getHalfExtents();
+        float* pos1 = npc.getRefData().getPosition().pos;
+        Ogre::Vector3 halfExt2 = mPhysEngine->getCharacter(targetNpc.getRefData().getHandle())->getHalfExtents();
+        float* pos2 = targetNpc.getRefData().getPosition().pos;
+
+        btVector3 from(pos1[0],pos1[1],pos1[2]+halfExt1.z);
+        btVector3 to(pos2[0],pos2[1],pos2[2]+halfExt2.z);
+
+        std::pair<std::string, float> result = mPhysEngine->rayTest(from, to,false);
+        if(result.first == "") return true;
         return false;
     }