diff --git a/src/generator.py b/src/generator.py
index c02e7f8..fb16a4e 100644
--- a/src/generator.py
+++ b/src/generator.py
@@ -151,12 +151,14 @@ for fname in files_funcs_groups:
                                 templine2 = templine1.replace('$group$', grname)
 
                                 if params['dtype'] == 'double':
-                                    std_dtype = 'lf'
+                                    std_dtype_out = '24.16e'
+                                    std_dtype_in = 'lf'
                                 elif params['dtype'] == 'int64_t':
-                                    std_dtype = 'ld'
+                                    std_dtype_out = 'ld'
+                                    std_dtype_in = 'ld'
 
-                                templine1 = templine2.replace('$group_dset_std_dtype$', std_dtype)
-                                templine2 = templine1
+                                templine1 = templine2.replace('$group_dset_std_dtype_out$', std_dtype_out)
+                                templine2 = templine1.replace('$group_dset_std_dtype_in$', std_dtype_in)
 
                                 f_out.write(templine2)
                         elif do_num:
diff --git a/src/templates_text/templator_text.org b/src/templates_text/templator_text.org
index 963f823..103a330 100644
--- a/src/templates_text/templator_text.org
+++ b/src/templates_text/templator_text.org
@@ -385,7 +385,7 @@ $group$_t* trexio_text_read_$group$(trexio_text_t* const file) {
     }
     
     for (uint64_t i=0 ; i<size_$group_dset$ ; ++i) {
-      rc = fscanf(f, "%$group_dset_std_dtype$", &($group$->$group_dset$[i]));
+      rc = fscanf(f, "%$group_dset_std_dtype_in$", &($group$->$group_dset$[i]));
       assert(!(rc != 1));
       if (rc != 1) {
         FREE(buffer);
@@ -467,7 +467,7 @@ trexio_exit_code trexio_text_flush_$group$(trexio_text_t* const file) {
 
   fprintf(f, "$group_dset$\n");
   for (uint64_t i=0 ; i<size_$group_dset$ ; ++i) {
-    fprintf(f, "%$group_dset_std_dtype$\n", $group$->$group_dset$[i]);
+    fprintf(f, "%$group_dset_std_dtype_out$\n", $group$->$group_dset$[i]);
   }
   // END REPEAT GROUP_DSET