diff --git a/src/SURFEX/default_surf_atm.F90 b/src/SURFEX/default_surf_atm.F90
index ae3e8cd7df916418cbf6a8f545d05c3032270d1f..f965f0c497e93e3bf1de6282b95e01473b85276a 100644
--- a/src/SURFEX/default_surf_atm.F90
+++ b/src/SURFEX/default_surf_atm.F90
@@ -116,7 +116,11 @@ ODRAG_COEF_ARP = .FALSE.
 OALDZ0H = .FALSE.
 ONOSOF = .TRUE.
 OSLOPE = .FALSE.
+#ifdef SFX_MNH
+OVERTSHIFT = .TRUE.
+#else
 OVERTSHIFT = .FALSE.
+#endif
 OVSHIFT_LW = .FALSE.
 OVSHIFT_PRCP = .FALSE.
 OCPL_GCM = .FALSE.