diff --git a/src/MNH/set_perturb.f90 b/src/MNH/set_perturb.f90
index 4501ba85fc59e9028ee8c0cf7cf6de292ea8570e..42e384c2a602a5eff3e16415e897edff93ae7922 100644
--- a/src/MNH/set_perturb.f90
+++ b/src/MNH/set_perturb.f90
@@ -257,7 +257,7 @@ IF (LOCEAN) THEN
   INOISB=NKWH
   INOISE=IKE
 ELSE
-  INOISB=2
+  INOISB=IKB
   INOISE=NKWH
 ENDIF
 !-------------------------------------------------------------------------------