diff --git a/src/main/CTEM.f90 b/src/main/CTEM.f90
index a7e6df83..4f074bab 100644
--- a/src/main/CTEM.f90
+++ b/src/main/CTEM.f90
@@ -148,7 +148,7 @@ program CTEM
    call io_write_tally(truedist,truelist(:,1:ntrue),obsdist,obslist,oposlist,depthdiam,degradation_state)
    if (.not.user%tallyonly) then
       write(*,*) "Writing surface files"
-      call io_write_surf(user,surf)
+      call io_write_surf(user,surf,domain)
    end if
 
    if (user%testflag) then ! Draw a profile across the crater