diff --git a/src/VTK/post.f90 b/src/VTK/post.f90
index 7331fa59ca633e82c562b5077623a94757835344..77826305fb1957bc68f904d42874562b687cf38d 100644
--- a/src/VTK/post.f90
+++ b/src/VTK/post.f90
@@ -95,7 +95,7 @@ character cs
 double precision :: eps,dil,current_time,activation_time,zmin,xx,yy,zz,maxe2d,dist
 double precision, allocatable, dimension (:) :: ov_nodee2d, ov_nodecrit
 double precision, allocatable, dimension (:) :: countnode 
-double precision,dimension(:,:),allocatable::s,n1,n2,n3
+double precision,dimension(:,:),allocatable::s,n1,n2,n3,zisodisp,zisoslx
 double precision,dimension(:,:,:),allocatable::strain,strainn
 double precision,dimension(:),allocatable::xi,yi,zi,ui,vi,wi,si,ei
 double precision,dimension(:),allocatable::s11,s12,s13,s22,s23,s33,str11,str12,str13,str22,str23,str33