diff --git a/apps/openmw/mwbase/world.hpp b/apps/openmw/mwbase/world.hpp
index 54babfbcb..25d434492 100644
--- a/apps/openmw/mwbase/world.hpp
+++ b/apps/openmw/mwbase/world.hpp
@@ -248,7 +248,7 @@ namespace MWBase
             /// Returns a pointer to the object the provided object would hit (if within the
             /// specified distance), and the point where the hit occurs. This will attempt to
             /// use the "Head" node, or alternatively the "Bip01 Head" node as a basis.
-            virtual std::pair<MWWorld::Ptr,osg::Vec3f> getHitContact(const MWWorld::Ptr &ptr, float distance) = 0;
+            virtual std::pair<MWWorld::Ptr,osg::Vec3f> getHitContact(const MWWorld::ConstPtr &ptr, float distance) = 0;
 
             virtual void adjustPosition (const MWWorld::Ptr& ptr, bool force) = 0;
             ///< Adjust position after load to be on ground. Must be called after model load.
diff --git a/apps/openmw/mwphysics/physicssystem.cpp b/apps/openmw/mwphysics/physicssystem.cpp
index d25099a80..5caffe4dd 100644
--- a/apps/openmw/mwphysics/physicssystem.cpp
+++ b/apps/openmw/mwphysics/physicssystem.cpp
@@ -770,7 +770,7 @@ namespace MWPhysics
         }
     };
 
-    std::pair<MWWorld::Ptr, osg::Vec3f> PhysicsSystem::getHitContact(const MWWorld::Ptr& actor,
+    std::pair<MWWorld::Ptr, osg::Vec3f> PhysicsSystem::getHitContact(const MWWorld::ConstPtr& actor,
                                                                      const osg::Vec3f &origin,
                                                                      const osg::Quat &orient,
                                                                       float queryDistance)
@@ -790,7 +790,7 @@ namespace MWPhysics
         object.setWorldTransform(btTransform(toBullet(orient), toBullet(center)));
 
         const btCollisionObject* me = NULL;
-        Actor* physactor = getActor(actor);
+        const Actor* physactor = getActor(actor);
         if (physactor)
             me = physactor->getCollisionObject();
 
diff --git a/apps/openmw/mwphysics/physicssystem.hpp b/apps/openmw/mwphysics/physicssystem.hpp
index 4edf462ca..0271db273 100644
--- a/apps/openmw/mwphysics/physicssystem.hpp
+++ b/apps/openmw/mwphysics/physicssystem.hpp
@@ -85,7 +85,7 @@ namespace MWPhysics
             std::vector<MWWorld::Ptr> getCollisions(const MWWorld::Ptr &ptr, int collisionGroup, int collisionMask) const; ///< get handles this object collides with
             osg::Vec3f traceDown(const MWWorld::Ptr &ptr, float maxHeight);
 
-            std::pair<MWWorld::Ptr, osg::Vec3f> getHitContact(const MWWorld::Ptr& actor,
+            std::pair<MWWorld::Ptr, osg::Vec3f> getHitContact(const MWWorld::ConstPtr& actor,
                                                                const osg::Vec3f &origin,
                                                                const osg::Quat &orientation,
                                                                float queryDistance);
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index d0b3ff99e..be54f557a 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -1056,7 +1056,7 @@ namespace MWWorld
     }
 
 
-    std::pair<MWWorld::Ptr,osg::Vec3f> World::getHitContact(const MWWorld::Ptr &ptr, float distance)
+    std::pair<MWWorld::Ptr,osg::Vec3f> World::getHitContact(const MWWorld::ConstPtr &ptr, float distance)
     {
         const ESM::Position &posdata = ptr.getRefData().getPosition();
 
diff --git a/apps/openmw/mwworld/worldimp.hpp b/apps/openmw/mwworld/worldimp.hpp
index 90fc60ac7..c4d37b008 100644
--- a/apps/openmw/mwworld/worldimp.hpp
+++ b/apps/openmw/mwworld/worldimp.hpp
@@ -344,7 +344,7 @@ namespace MWWorld
             /// Returns a pointer to the object the provided object would hit (if within the
             /// specified distance), and the point where the hit occurs. This will attempt to
             /// use the "Head" node as a basis.
-            virtual std::pair<MWWorld::Ptr,osg::Vec3f> getHitContact(const MWWorld::Ptr &ptr, float distance);
+            virtual std::pair<MWWorld::Ptr,osg::Vec3f> getHitContact(const MWWorld::ConstPtr &ptr, float distance);
 
             /// @note No-op for items in containers. Use ContainerStore::removeItem instead.
             virtual void deleteObject (const Ptr& ptr);