diff --git a/src/MNH/write_lbn.f90 b/src/MNH/write_lbn.f90
index d9495811c0ef4dd1029abcde0926697b5465e3ea..978b1d23381526ef20927e7a1a1b181b9e27cc26 100644
--- a/src/MNH/write_lbn.f90
+++ b/src/MNH/write_lbn.f90
@@ -510,6 +510,13 @@ IF (NSV >=1) THEN
     END IF  
   END IF
   !
+  TZFIELD%CSTDNAME   = ''
+  TZFIELD%CUNITS     = 'kg kg-1'
+  TZFIELD%CDIR       = 'XY'
+  TZFIELD%NGRID      = 1
+  TZFIELD%NTYPE      = TYPEREAL
+  TZFIELD%NDIMS      = 3
+  !
   DO JSV = NSV_CHEMBEG,NSV_CHEMEND
     IF(NSIZELBXSV_ll /= 0) THEN
       TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CNAMES(JSV-NSV_CHEMBEG+1)))