diff --git a/matlab/AUG/gdat_aug.m b/matlab/AUG/gdat_aug.m
index 00dcc381f3eacb45874fe59b7242c6d5e6036d53..e9991d9ae0924c98c2599f033562f15705d6448b 100644
--- a/matlab/AUG/gdat_aug.m
+++ b/matlab/AUG/gdat_aug.m
@@ -552,7 +552,11 @@ elseif strcmp(mapping_for_aug.method,'switchcase')
         gdat_data.r(inotok) = NaN;
         try
           % eval(['[z_time]=sf2ab(diag_name,shot,z_node,''-exp'',exp_name_eff' extra_arg_sf2sig_eff_string ');']);
-          [z_time,err]=rdaAUG_eff(shot,diag_name,'Ti',exp_name_eff,[],extra_arg_sf2sig_eff_string,['area-base:' z_node ':1']);
+          if [exist('sf2sig')==3]
+            [z_time,err]=rdaAUG_eff(shot,diag_name,'z_time',exp_name_eff,[],extra_arg_sf2sig_eff_string,['area-base:' z_node ':1']);
+          else
+            [z_time,err]=rdaAUG_eff(shot,diag_name,'z_time',exp_name_eff,[],extra_arg_sf2sig_eff_string);
+          end
           gdat_data.z = z_time.data;
           inotok=find(gdat_data.z<=0);
           gdat_data.z(inotok) = NaN;