diff --git a/example/maxwell_sibc/sphere.pro b/example/maxwell_sibc/sphere.pro
index 51517b2c56a357d16baae4f32928f8ab0f625199..43abd03e6e94fe66377021fcc0acc98a6f1bab94 100644
--- a/example/maxwell_sibc/sphere.pro
+++ b/example/maxwell_sibc/sphere.pro
@@ -16,17 +16,15 @@ Function{
   Mu0  = 4*Pi*1e-7;      // [H/m]
   Eps0 = 1/(Mu0 * C0^2); // [F/m]
 
-  // Conductivity (coming from sphere.dat) //
-  If(isSC == 1)                                            // Superconductor
-    Sigma[] = Sigma - J[] / (Mu0 * Lambda^2 * Re[Puls[]]); // [S/m]
+  // Leontovich SIBC (H-Formulation) //
+  If(isSC == 0)
+    SL[] = Sqrt[(J[] * Puls[] * Mu0) / Sigma];   // H-Formulation
   EndIf
-  If(isSC == 0)                                            // Normal conductor
-    Sigma[] = Sigma;                                       // [S/m]
+  If(isSC == 1)
+    SL[] = 0.5 * Puls[]^2 * Mu0^2 * Lambda^3 * Sigma +
+           J[] * Puls[]   * Mu0   * Lambda;      // H-Formulation
   EndIf
-
-  // Leontovich SIBC (H-Formulation) //
-  SL[] = Sqrt[(J[] * Re[Puls[]] * Mu0) / Sigma[]]; // H-Formulation
-  SIbc[] = -1.0 / SL[];                            // E-Formulation
+  SIbc[] = -1.0 / SL[];                          // E-Formulation
 }
 
 Integration{