diff --git a/apps/openmw/CMakeLists.txt b/apps/openmw/CMakeLists.txt
index 4b74d308fb..44f37dac0c 100644
--- a/apps/openmw/CMakeLists.txt
+++ b/apps/openmw/CMakeLists.txt
@@ -72,6 +72,7 @@ add_openmw_dir (mwworld
 add_openmw_dir (mwphysics
     physicssystem trace collisiontype actor convert object heightfield closestnotmerayresultcallback
     contacttestresultcallback deepestnotmecontacttestresultcallback stepper movementsolver
+    closestnotmeconvexresultcallback
     )
 
 add_openmw_dir (mwclass
diff --git a/apps/openmw/mwphysics/closestnotmeconvexresultcallback.cpp b/apps/openmw/mwphysics/closestnotmeconvexresultcallback.cpp
new file mode 100644
index 0000000000..ddfdb8a42f
--- /dev/null
+++ b/apps/openmw/mwphysics/closestnotmeconvexresultcallback.cpp
@@ -0,0 +1,34 @@
+#include "closestnotmeconvexresultcallback.hpp"
+
+#include <BulletCollision/CollisionDispatch/btCollisionObject.h>
+
+namespace MWPhysics
+{
+    ClosestNotMeConvexResultCallback::ClosestNotMeConvexResultCallback(const btCollisionObject *me, const btVector3 &motion, btScalar minCollisionDot)
+    : btCollisionWorld::ClosestConvexResultCallback(btVector3(0.0, 0.0, 0.0), btVector3(0.0, 0.0, 0.0)),
+      mMe(me), mMotion(motion), mMinCollisionDot(minCollisionDot)
+    {
+    }
+
+    btScalar ClosestNotMeConvexResultCallback::addSingleResult(btCollisionWorld::LocalConvexResult& convexResult,bool normalInWorldSpace)
+    {
+        if (convexResult.m_hitCollisionObject == mMe)
+            return btScalar(1);
+
+        btVector3 hitNormalWorld;
+        if (normalInWorldSpace)
+            hitNormalWorld = convexResult.m_hitNormalLocal;
+        else
+        {
+            ///need to transform normal into worldspace
+            hitNormalWorld = convexResult.m_hitCollisionObject->getWorldTransform().getBasis()*convexResult.m_hitNormalLocal;
+        }
+
+        // dot product of the motion vector against the collision contact normal
+        btScalar dotCollision = mMotion.dot(hitNormalWorld);
+        if (dotCollision <= mMinCollisionDot)
+            return btScalar(1);
+
+        return ClosestConvexResultCallback::addSingleResult(convexResult, normalInWorldSpace);
+    }
+}
diff --git a/apps/openmw/mwphysics/closestnotmeconvexresultcallback.hpp b/apps/openmw/mwphysics/closestnotmeconvexresultcallback.hpp
new file mode 100644
index 0000000000..e4e960ab81
--- /dev/null
+++ b/apps/openmw/mwphysics/closestnotmeconvexresultcallback.hpp
@@ -0,0 +1,24 @@
+#ifndef OPENMW_MWPHYSICS_CLOSESTNOTMECONVEXRESULTCALLBACK_H
+#define OPENMW_MWPHYSICS_CLOSESTNOTMECONVEXRESULTCALLBACK_H
+
+#include <BulletCollision/CollisionDispatch/btCollisionWorld.h>
+
+class btCollisionObject;
+
+namespace MWPhysics
+{
+    class ClosestNotMeConvexResultCallback : public btCollisionWorld::ClosestConvexResultCallback
+    {
+    public:
+        ClosestNotMeConvexResultCallback(const btCollisionObject *me, const btVector3 &motion, btScalar minCollisionDot);
+
+        virtual btScalar addSingleResult(btCollisionWorld::LocalConvexResult& convexResult,bool normalInWorldSpace);
+
+    protected:
+        const btCollisionObject *mMe;
+        const btVector3 mMotion;
+        const btScalar mMinCollisionDot;
+    };
+}
+
+#endif
diff --git a/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.cpp b/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.cpp
index be94128c18..0baaa62417 100644
--- a/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.cpp
+++ b/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.cpp
@@ -2,6 +2,8 @@
 
 #include <algorithm>
 
+#include <BulletCollision/CollisionDispatch/btCollisionObject.h>
+
 #include "../mwworld/class.hpp"
 
 #include "ptrholder.hpp"
diff --git a/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.hpp b/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.hpp
index 2fcef66db3..f1107046b1 100644
--- a/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.hpp
+++ b/apps/openmw/mwphysics/deepestnotmecontacttestresultcallback.hpp
@@ -3,9 +3,10 @@
 
 #include <vector>
 
-#include <BulletCollision/CollisionDispatch/btCollisionObject.h>
 #include <BulletCollision/CollisionDispatch/btCollisionWorld.h>
 
+class btCollisionObject;
+
 namespace MWPhysics
 {
     class DeepestNotMeContactTestResultCallback : public btCollisionWorld::ContactResultCallback
diff --git a/apps/openmw/mwphysics/trace.cpp b/apps/openmw/mwphysics/trace.cpp
index 13bc7f7983..58082f4db2 100644
--- a/apps/openmw/mwphysics/trace.cpp
+++ b/apps/openmw/mwphysics/trace.cpp
@@ -7,48 +7,11 @@
 
 #include "collisiontype.hpp"
 #include "actor.hpp"
+#include "closestnotmeconvexresultcallback.hpp"
 
 namespace MWPhysics
 {
 
-class ClosestNotMeConvexResultCallback : public btCollisionWorld::ClosestConvexResultCallback
-{
-public:
-    ClosestNotMeConvexResultCallback(const btCollisionObject *me, const btVector3 &motion, btScalar minCollisionDot)
-      : btCollisionWorld::ClosestConvexResultCallback(btVector3(0.0, 0.0, 0.0), btVector3(0.0, 0.0, 0.0)),
-        mMe(me), mMotion(motion), mMinCollisionDot(minCollisionDot)
-    {
-    }
-
-    virtual btScalar addSingleResult(btCollisionWorld::LocalConvexResult& convexResult,bool normalInWorldSpace)
-    {
-        if(convexResult.m_hitCollisionObject == mMe)
-            return btScalar( 1 );
-
-        btVector3 hitNormalWorld;
-        if(normalInWorldSpace)
-            hitNormalWorld = convexResult.m_hitNormalLocal;
-        else
-        {
-            ///need to transform normal into worldspace
-            hitNormalWorld = convexResult.m_hitCollisionObject->getWorldTransform().getBasis()*convexResult.m_hitNormalLocal;
-        }
-
-        // dot product of the motion vector against the collision contact normal
-        btScalar dotCollision = mMotion.dot(hitNormalWorld);
-        if(dotCollision <= mMinCollisionDot)
-            return btScalar(1);
-
-        return ClosestConvexResultCallback::addSingleResult(convexResult, normalInWorldSpace);
-    }
-
-protected:
-    const btCollisionObject *mMe;
-    const btVector3 mMotion;
-    const btScalar mMinCollisionDot;
-};
-
-
 void ActorTracer::doTrace(const btCollisionObject *actor, const osg::Vec3f& start, const osg::Vec3f& end, const btCollisionWorld* world)
 {
     const btVector3 btstart = Misc::Convert::toBullet(start);