diff --git a/Magnetodynamics/transfo.geo b/Magnetodynamics/transfo.geo
index ae9875b450aa83fde6797f390bbffcd5a91292bd..072bc9b1a443cf35f00e6bd9cf528b678c0d4eb5 100644
--- a/Magnetodynamics/transfo.geo
+++ b/Magnetodynamics/transfo.geo
@@ -1,5 +1,5 @@
 
-Include "transfo_common.dat";
+Include "transfo_common.pro";
 
 Solver.AutoShowLastStep = 0; // don't automatically show the last time step
 
diff --git a/Magnetodynamics/transfo.pro b/Magnetodynamics/transfo.pro
index 906470b2c2dffe2b16d2bbd660147d1371899ae6..27e6bb867398e02aa43a5b56338ceba6de1e0d02 100644
--- a/Magnetodynamics/transfo.pro
+++ b/Magnetodynamics/transfo.pro
@@ -71,7 +71,7 @@ Function {
 
   mu[Air] = 1 * mu0;
 
-  mur_Core = 1;
+  mur_Core = 100;
   mu[Core] = mur_Core * mu0;
 
   mu[Coils] = 1 * mu0;