diff --git a/src/LinearMath/btMotionState.h b/src/LinearMath/btMotionState.h
new file mode 100644
index 000000000..516b9b055
--- /dev/null
+++ b/src/LinearMath/btMotionState.h
@@ -0,0 +1,42 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef BT_MOTIONSTATE_H
+#define BT_MOTIONSTATE_H
+
+
+///btMotionState allows the dynamics world to synchronize the updated world transforms with graphics
+///For optimizations, potentially only moving objects get synchronized (using setWorldPosition/setWorldOrientation)
+class	btMotionState
+{
+	public:
+		
+		virtual ~btMotionState()
+		{
+			
+		}
+		
+		virtual void	getWorldPosition(btVector3& worldPos )=0;
+		virtual void	getWorldScaling(btVector3& scaling)=0;
+		virtual void	getWorldOrientation(btQuaternion& orn)=0;
+		
+		virtual void	setWorldPosition(const btVector3& worldPos)=0;
+		virtual	void	setWorldOrientation(const btQuaternion& orn)=0;
+
+		virtual	void	calculateWorldTransformations()=0;
+
+};
+
+#endif //BT_MOTIONSTATE_H