diff --git a/unsupported/Eigen/AlignedVector3 b/unsupported/Eigen/AlignedVector3
index 135eec5725..47a86d4c00 100644
--- a/unsupported/Eigen/AlignedVector3
+++ b/unsupported/Eigen/AlignedVector3
@@ -61,7 +61,7 @@ template<typename _Scalar> class AlignedVector3
     Scalar* data() { return m_coeffs.data(); }
     const Scalar* data() const { return m_coeffs.data(); }
     Index innerStride() const { return 1; }
-    Index outerStride() const { return m_coeffs.outerStride(); }
+    Index outerStride() const { return 3; }
 
     inline const Scalar& coeff(Index row, Index col) const
     { return m_coeffs.coeff(row, col); }