diff --git a/src/BulletDynamics/Featherstone/btMultiBodySolverConstraint.h b/src/BulletDynamics/Featherstone/btMultiBodySolverConstraint.h
index f48935d74..45e31a176 100644
--- a/src/BulletDynamics/Featherstone/btMultiBodySolverConstraint.h
+++ b/src/BulletDynamics/Featherstone/btMultiBodySolverConstraint.h
@@ -32,14 +32,15 @@ ATTRIBUTE_ALIGNED16 (struct)	btMultiBodySolverConstraint
 	{}
 
 	int				m_deltaVelAindex;//more generic version of m_relpos1CrossNormal/m_contactNormal1
-	btVector3		m_relpos1CrossNormal;
-	btVector3		m_contactNormal1;
 	int				m_jacAindex;
-
 	int				m_deltaVelBindex;
+	int				m_jacBindex;
+
+	btVector3		m_relpos1CrossNormal;
+	btVector3		m_contactNormal1;	
 	btVector3		m_relpos2CrossNormal;
 	btVector3		m_contactNormal2; //usually m_contactNormal2 == -m_contactNormal1, but not always
-	int				m_jacBindex;
+	
 
 	btVector3		m_angularComponentA;
 	btVector3		m_angularComponentB;