diff --git a/src/MNH/default_desfmn.f90 b/src/MNH/default_desfmn.f90
index 7ba55add1bd92ef8b3530e4d691628aa3706decc..28210a41fcfe3380e36e7e22aa9042d75282e67d 100644
--- a/src/MNH/default_desfmn.f90
+++ b/src/MNH/default_desfmn.f90
@@ -378,7 +378,7 @@ IF (KMI == 1) THEN
   XASSELIN  = 0.2
   XASSELIN_SV = 0.02
   LCORIO    = .TRUE.
-  LNUMDIFU  = .FALSE.
+  LNUMDIFU  = .TRUE.
   LNUMDIFTH = .FALSE.
   LNUMDIFSV = .FALSE.
   XALZBOT   = 4000.