diff --git a/src/include/Configuration.h b/src/include/Configuration.h
index d23aa6ff178ee60c8f251ab9b88a86349b6e1762..67666c6bfa18a0e8c161cc2eaf9c1baf9b2b9b9f 100644
--- a/src/include/Configuration.h
+++ b/src/include/Configuration.h
@@ -288,8 +288,6 @@ protected:
   dcomplex ***_dc0_matrix;
   //! \brief Vector of sphere radii expressed in m, with size [N_SPHERES].
   double *_radii_of_spheres;
-  //! \brief Matrix of fractional transition radii with size [N_SPHERES x LAYERS].
-  double **_rcf;
   //! \brief Vector of sphere ID numbers, with size [N_SPHERES].
   int *_iog_vec;
   //! \brief Vector of layer numbers for every sphere, with size [N_SPHERES].
@@ -383,6 +381,8 @@ public:
   const int& max_layers = _max_layers;
   //! \brief Read only view on flag to control whether to add an external layer.
   const bool& use_external_sphere = _use_external_sphere;
+  //! \brief Matrix of fractional transition radii with size [CONFIGURATIONS x LAYERS].
+  double **_rcf;
   
   /*! \brief Build a scatterer configuration structure.
    *