diff --git a/src/MNH/read_exsegn.f90 b/src/MNH/read_exsegn.f90
index 56df1c2a437417e575deeb7e7f2f7d3004a89eca..e8f0e9d738b2c9c6fe179715410d8ec5850e9f33 100644
--- a/src/MNH/read_exsegn.f90
+++ b/src/MNH/read_exsegn.f90
@@ -1418,12 +1418,6 @@ ELSE
   END IF
 END IF
 !
-IF(CTURBLEN=='RM17') THEN
-  XCEDIS=0.34
-ELSE
-  XCEDIS=0.84
-END IF
-!
 !*       3.3  Moist turbulence
 !
 IF ( LUSERC .AND. CTURB /= 'NONE' ) THEN