- m_SplinePoles[0] = vcl_sqrt(664.0 - vcl_sqrt(438976.0)) + vcl_sqrt(304.0) - 19.0;
- m_SplinePoles[1] = vcl_sqrt(664.0 + vcl_sqrt(438976.0)) - vcl_sqrt(304.0) - 19.0;
+ m_SplinePoles[0] = std::sqrt(664.0 - std::sqrt(438976.0)) + std::sqrt(304.0) - 19.0;
+ m_SplinePoles[1] = std::sqrt(664.0 + std::sqrt(438976.0)) - std::sqrt(304.0) - 19.0;