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diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.h
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+++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2013 Erwin Coumans  http://bulletphysics.org
+
+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.
+*/
+
+///This file was written by Erwin Coumans
+
+#ifndef BT_MULTIBODY_JOINT_MOTOR_H
+#define BT_MULTIBODY_JOINT_MOTOR_H
+
+#include "btMultiBodyConstraint.h"
+struct btSolverInfo;
+
+class btMultiBodyJointMotor : public btMultiBodyConstraint
+{
+protected:
+
+	btScalar	m_desiredVelocity;
+	btScalar	m_desiredPosition;
+	btScalar    m_kd;
+	btScalar    m_kp;
+	btScalar	m_erp;
+	btScalar	m_rhsClamp;//maximum error
+	
+
+public:
+
+	btMultiBodyJointMotor(btMultiBody* body, int link, btScalar desiredVelocity, btScalar maxMotorImpulse);
+	btMultiBodyJointMotor(btMultiBody* body, int link, int linkDoF, btScalar desiredVelocity, btScalar maxMotorImpulse);
+	virtual ~btMultiBodyJointMotor();
+    virtual void finalizeMultiDof();
+
+	virtual int getIslandIdA() const;
+	virtual int getIslandIdB() const;
+
+	virtual void createConstraintRows(btMultiBodyConstraintArray& constraintRows,
+		btMultiBodyJacobianData& data,
+		const btContactSolverInfo& infoGlobal);
+
+    virtual void setVelocityTarget(btScalar velTarget, btScalar kd = 1.f)
+    {
+        m_desiredVelocity = velTarget;
+        m_kd = kd;
+    }
+
+    virtual void setPositionTarget(btScalar posTarget, btScalar kp = 1.f)
+    {
+        m_desiredPosition = posTarget;
+        m_kp = kp;
+    }
+    
+	virtual void setErp(btScalar erp)
+	{
+		m_erp = erp;
+	}
+	virtual btScalar getErp() const
+	{
+		return m_erp;
+	}
+	virtual void setRhsClamp(btScalar rhsClamp)
+	{
+		m_rhsClamp = rhsClamp;
+	}
+	virtual void debugDraw(class btIDebugDraw* drawer)
+	{
+		//todo(erwincoumans)
+	}
+};
+
+#endif //BT_MULTIBODY_JOINT_MOTOR_H
+