diff --git a/unsupported/Eigen/AlignedVector3 b/unsupported/Eigen/AlignedVector3
index 15510a258..6e9772cf5 100644
--- a/unsupported/Eigen/AlignedVector3
+++ b/unsupported/Eigen/AlignedVector3
@@ -189,7 +189,7 @@ template<typename _Scalar> class AlignedVector3
     }
 
     template<typename Derived>
-    inline bool isApprox(const MatrixBase<Derived>& other, RealScalar eps=dummy_precision<Scalar>()) const
+    inline bool isApprox(const MatrixBase<Derived>& other, RealScalar eps=NumTraits<Scalar>::dummy_precision()) const
     {
       return m_coeffs.template head<3>().isApprox(other,eps);
     }