diff --git a/code/post.f90 b/code/post.f90
index 37fcda6..01336e3 100644
--- a/code/post.f90
+++ b/code/post.f90
@@ -14,7 +14,7 @@
 
      REAL, DIMENSION(:,:,:,:), ALLOCATABLE :: old_scalar, new_scalar
 
-     PUBLIC :: main
+     PUBLIC :: main, main_lb
     CONTAINS
 
      SUBROUTINE main