diff --git a/Magnetodynamics/transfo.pro b/Magnetodynamics/transfo.pro
index d8d3ebb906b1fe92eab6d100e541040ec3170320..fcd38370ef9bcfa8ec70373e76894de6292a2119 100644
--- a/Magnetodynamics/transfo.pro
+++ b/Magnetodynamics/transfo.pro
@@ -23,7 +23,7 @@ DefineConstant[
     Name "Parameters/01Conductor type"}
   Freq = {1, Min 0, Max 1e3, Step 1,
     Name "Parameters/Frequency"}
-  Flag_FrequencyDomain = {0, Choices{0, 1},
+  Flag_FrequencyDomain = {1, Choices{0, 1},
     Name "Parameters/Frequency-domain?"}
   mur_Core = {1000, Min 1, Max 10000, Step 1,
     Name "Parameters/Core relative permeability"}