diff --git a/src/MNH/phys_paramn.f90 b/src/MNH/phys_paramn.f90
index 9ad50c460414bcc8ba7eb263c4667d6cbeea6db3..a50f07b019b6c41acbfb4351103df09e1aaf1d2d 100644
--- a/src/MNH/phys_paramn.f90
+++ b/src/MNH/phys_paramn.f90
@@ -1233,7 +1233,7 @@ ZTIME1 = ZTIME2
 XTIME_BU_PROCESS = 0.
 XTIME_LES_BU_PROCESS = 0.
 !
-IF (LDRAGTREE) CALL DRAG_VEG(XUT,XVT,XTKET,LDEPOTREE,XVDEPOTREE, &
+IF (LDRAGTREE) CALL DRAG_VEG(XTSTEP,XUT,XVT,XTKET,LDEPOTREE,XVDEPOTREE, &
                              CCLOUD, XPABST,XTHT,XRT,XSVT,       &
                              XRHODJ,XZZ,XRUS, XRVS,              &
                              XRTKES,XRTHS, XRRS,XRSVS)