diff --git a/scm/src/GFS_typedefs.F90 b/scm/src/GFS_typedefs.F90
index f73f6a90..367aa196 100644
--- a/scm/src/GFS_typedefs.F90
+++ b/scm/src/GFS_typedefs.F90
@@ -5087,7 +5087,7 @@ subroutine control_initialize (Model, nlunit, fn_nml, me, master, &
     if ( Model%do_ugwp_v1_w_gsldrag) then
        if(Model%gwd_opt == 1 )then
           Model%gwd_opt =2
-	  Model%nmtvr = 24
+          Model%nmtvr = 24
        endif
        Model%do_gsl_drag_ls_bl    = .true.
        Model%do_gsl_drag_tofd     = .true.