diff --git a/src/BulletDynamics/ConstraintSolver/btSolverBody.h b/src/BulletDynamics/ConstraintSolver/btSolverBody.h
index 4e1a8df6a..ccc45996c 100644
--- a/src/BulletDynamics/ConstraintSolver/btSolverBody.h
+++ b/src/BulletDynamics/ConstraintSolver/btSolverBody.h
@@ -105,7 +105,7 @@ operator+(const btSimdScalar& v1, const btSimdScalar& v2)
 #endif
 
 ///The btSolverBody is an internal datastructure for the constraint solver. Only necessary data is packed to increase cache coherence/performance.
-ATTRIBUTE_ALIGNED64 (struct)	btSolverBody
+ATTRIBUTE_ALIGNED16 (struct)	btSolverBody
 {
 	BT_DECLARE_ALIGNED_ALLOCATOR();
 	btTransform		m_worldTransform;
diff --git a/src/BulletDynamics/Dynamics/btRigidBody.h b/src/BulletDynamics/Dynamics/btRigidBody.h
index c5bf63b4c..f0e07f942 100644
--- a/src/BulletDynamics/Dynamics/btRigidBody.h
+++ b/src/BulletDynamics/Dynamics/btRigidBody.h
@@ -97,7 +97,7 @@ class btRigidBody  : public btCollisionObject
 
 protected:
 
-	ATTRIBUTE_ALIGNED64(btVector3		m_deltaLinearVelocity);
+	ATTRIBUTE_ALIGNED16(btVector3		m_deltaLinearVelocity);
 	btVector3		m_deltaAngularVelocity;
 	btVector3		m_angularFactor;
 	btVector3		m_invMass;