diff --git a/tools/lfi2cdf/src/mode_util.f90 b/tools/lfi2cdf/src/mode_util.f90
index 122395ae70ac73e461b5d34a261ae3c1009f0eff..70c902b3189a9b46d71bdaff2f9ecfabb86ec2c9 100644
--- a/tools/lfi2cdf/src/mode_util.f90
+++ b/tools/lfi2cdf/src/mode_util.f90
@@ -79,8 +79,9 @@ CONTAINS
     INTEGER(KIND=8),DIMENSION(:),ALLOCATABLE :: iwork
 #endif
     !JUAN CYCCL3
-    INTEGER,PARAMETER                        :: JPHEXT=1 ! 3
-
+    INTEGER                        :: JPHEXT
+    CALL FMREADLFIN1(klu,'JPHEXT',JPHEXT,iresp)
+    IF (iresp /= 0) JPHEXT=1
     ! First check if IMAX,JMAX,KMAX exist in LFI file
     ! to handle 3D, 2D variables -> update IDIMX,IDIMY,IDIMZ
     CALL FMREADLFIN1(klu,'IMAX',IDIMX,iresp)
diff --git a/tools/lfiz/src/lfiz.f90 b/tools/lfiz/src/lfiz.f90
index f169ef204a189819946e4b9d3f2ffe4ca5c3ccc2..de9b42b530b34fe53112a708238ae02139763af2 100644
--- a/tools/lfiz/src/lfiz.f90
+++ b/tools/lfiz/src/lfiz.f90
@@ -18,6 +18,7 @@ CHARACTER(LEN=50) :: yexe
 INTEGER, PARAMETER :: FM_FIELD_SIZE = 16
 INTEGER, PARAMETER :: ISRCLU  = 11
 INTEGER, PARAMETER :: IDESTLU = 12
+INTEGER :: JPHEXT
 INTEGER :: iverb
 INTEGER :: inap ! nb d'articles prevus (utile a la creation)
 INTEGER :: inaf ! nb d'articles presents dans un fichier existant
@@ -107,15 +108,16 @@ IF (iresp == 0) THEN
     STOP 9
 END IF
 
-
+CALL FMREADLFIN1(ISRCLU,'JPHEXT',JPHEXT,iresp)
+IF (iresp /= 0) JPHEXT = 1
 
 ! First check if IMAX,JMAX,KMAX exist in LFI file
 ! to handle 3D, 2D variables -> update IDIMX,IDIMY,IDIMZ
 CALL FMREADLFIN1(ISRCLU,'IMAX',IDIMX,iresp)
-IF (iresp == 0) IDIMX = IDIMX+2  ! IMAX + 2*JPHEXT
+IF (iresp == 0) IDIMX = IDIMX+2*JPHEXT  ! IMAX + 2*JPHEXT
 !
 CALL FMREADLFIN1(ISRCLU,'JMAX',IDIMY,iresp)
-IF (iresp == 0) IDIMY = IDIMY+2  ! JMAX + 2*JPHEXT
+IF (iresp == 0) IDIMY = IDIMY+2*JPHEXT  ! JMAX + 2*JPHEXT
 !
 CALL FMREADLFIN1(ISRCLU,'KMAX',IDIMZ,iresp)
 IF (iresp == 0) IDIMZ = IDIMZ+2  ! KMAX + 2*JPVEXT