diff --git a/gtsam/geometry/Pose3.h b/gtsam/geometry/Pose3.h
index d70295f58..725a888ca 100644
--- a/gtsam/geometry/Pose3.h
+++ b/gtsam/geometry/Pose3.h
@@ -326,6 +326,12 @@ public:
     ar & BOOST_SERIALIZATION_NVP(t_);
   }
   /// @}
+ 
+#ifdef GTSAM_USE_QUATERNIONS
+  // Align if we are using Quaternions
+  public:
+    EIGEN_MAKE_ALIGNED_OPERATOR_NEW
+#endif
 };
 // Pose3 class