diff --git a/src/MNH/write_lfifm1_for_diag_supp.f90 b/src/MNH/write_lfifm1_for_diag_supp.f90
index fe258339c24f28ce5f521bd18685baccdd86b2d8..1412e986da03976f1c12034a49dd7a083cd443b4 100644
--- a/src/MNH/write_lfifm1_for_diag_supp.f90
+++ b/src/MNH/write_lfifm1_for_diag_supp.f90
@@ -963,7 +963,7 @@ IF (CSURF=='EXTE') THEN
       NTYPE      = TYPEREAL,                            &
       NDIMS      = 2,                                   &
       LTIMEDEP   = .TRUE.                               )
-    CALL IO_Field_write(TPFILE,TZFIELD,XCURRENT_LWD)
+    CALL IO_Field_write(TPFILE,TZFIELD,XCURRENT_LWU)
   END IF
 END IF