diff --git a/apps/openmw/mwbase/world.hpp b/apps/openmw/mwbase/world.hpp
index 29f821e85..f42edafd4 100644
--- a/apps/openmw/mwbase/world.hpp
+++ b/apps/openmw/mwbase/world.hpp
@@ -407,7 +407,7 @@ namespace MWBase
             virtual void getItemsOwnedBy (const MWWorld::Ptr& npc, std::vector<MWWorld::Ptr>& out) = 0;
             ///< get all items in active cells owned by this Npc
 
-            virtual bool getLOS(const MWWorld::Ptr& npc,const MWWorld::Ptr& targetNpc) = 0;
+            virtual bool getLOS(const MWWorld::Ptr& actor,const MWWorld::Ptr& targetActor) = 0;
             ///< get Line of Sight (morrowind stupid implementation)
 
             virtual float getDistToNearestRayHit(const Ogre::Vector3& from, const Ogre::Vector3& dir, float maxDist) = 0;
diff --git a/apps/openmw/mwscript/aiextensions.cpp b/apps/openmw/mwscript/aiextensions.cpp
index 823d22a6a..9a3387a00 100644
--- a/apps/openmw/mwscript/aiextensions.cpp
+++ b/apps/openmw/mwscript/aiextensions.cpp
@@ -371,6 +371,12 @@ namespace MWScript
 
                     MWWorld::Ptr actor = MWBase::Environment::get().getWorld()->getPtr(actorID, true);
 
+                    if(!actor.getClass().isActor() || !observer.getClass().isActor())
+                    {
+                        runtime.push(0);
+                        return;
+                    }
+
                     Interpreter::Type_Integer value =
                             MWBase::Environment::get().getWorld()->getLOS(observer, actor) &&
                             MWBase::Environment::get().getMechanicsManager()->awarenessCheck(actor, observer);
@@ -392,9 +398,10 @@ namespace MWScript
                     std::string actorID = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
 
+
                     MWWorld::Ptr dest = MWBase::Environment::get().getWorld()->getPtr(actorID,true);
                     bool value = false;
-                    if(dest != MWWorld::Ptr() )
+                    if(dest != MWWorld::Ptr() && source.getClass().isActor() && dest.getClass().isActor())
                     {
                         value = MWBase::Environment::get().getWorld()->getLOS(source,dest);
                     }
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index 6e975d25a..bcae8c070 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -2031,20 +2031,24 @@ namespace MWWorld
         }
     }
 
-    bool World::getLOS(const MWWorld::Ptr& npc,const MWWorld::Ptr& targetNpc)
+    bool World::getLOS(const MWWorld::Ptr& actor,const MWWorld::Ptr& targetActor)
     {
-        if (!targetNpc.getRefData().isEnabled() || !npc.getRefData().isEnabled())
+        if (!targetActor.getRefData().isEnabled() || !actor.getRefData().isEnabled())
             return false; // cannot get LOS unless both NPC's are enabled
-        Ogre::Vector3 halfExt1 = mPhysEngine->getCharacter(npc.getRefData().getHandle())->getHalfExtents();
-        const float* pos1 = npc.getRefData().getPosition().pos;
-        Ogre::Vector3 halfExt2 = mPhysEngine->getCharacter(targetNpc.getRefData().getHandle())->getHalfExtents();
-        const float* pos2 = targetNpc.getRefData().getPosition().pos;
+        if (!targetActor.getRefData().getBaseNode() || !targetActor.getRefData().getBaseNode())
+            return false; // not in active cell
 
-        btVector3 from(pos1[0],pos1[1],pos1[2]+halfExt1.z);
-        btVector3 to(pos2[0],pos2[1],pos2[2]+halfExt2.z);
+        Ogre::Vector3 halfExt1 = mPhysEngine->getCharacter(actor.getRefData().getHandle())->getHalfExtents();
+        const float* pos1 = actor.getRefData().getPosition().pos;
+        Ogre::Vector3 halfExt2 = mPhysEngine->getCharacter(targetActor.getRefData().getHandle())->getHalfExtents();
+        const float* pos2 = targetActor.getRefData().getPosition().pos;
+
+        btVector3 from(pos1[0],pos1[1],pos1[2]+halfExt1.z*2*0.9); // eye level
+        btVector3 to(pos2[0],pos2[1],pos2[2]+halfExt2.z*2*0.9);
 
         std::pair<std::string, float> result = mPhysEngine->rayTest(from, to,false);
         if(result.first == "") return true;
+
         return false;
     }
 
diff --git a/apps/openmw/mwworld/worldimp.hpp b/apps/openmw/mwworld/worldimp.hpp
index db599b0de..8cb2ac18a 100644
--- a/apps/openmw/mwworld/worldimp.hpp
+++ b/apps/openmw/mwworld/worldimp.hpp
@@ -482,7 +482,7 @@ namespace MWWorld
             virtual void getItemsOwnedBy (const MWWorld::Ptr& npc, std::vector<MWWorld::Ptr>& out);
             ///< get all items in active cells owned by this Npc
 
-            virtual bool getLOS(const MWWorld::Ptr& npc,const MWWorld::Ptr& targetNpc);
+            virtual bool getLOS(const MWWorld::Ptr& actor,const MWWorld::Ptr& targetActor);
             ///< get Line of Sight (morrowind stupid implementation)
 
             virtual float getDistToNearestRayHit(const Ogre::Vector3& from, const Ogre::Vector3& dir, float maxDist);