diff --git a/unsupported/Eigen/AlignedVector3 b/unsupported/Eigen/AlignedVector3
index 854f0601f..aaec5f98a 100644
--- a/unsupported/Eigen/AlignedVector3
+++ b/unsupported/Eigen/AlignedVector3
@@ -152,7 +152,6 @@ template<typename _Scalar> class AlignedVector3
     {
       ei_assert(m_coeffs.w()==Scalar(0));
       ei_assert(other.m_coeffs.w()==Scalar(0));
-      Scalar r = m_coeffs.dot(other.m_coeffs);
       return m_coeffs.dot(other.m_coeffs);
     }