diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/export.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/export.tt
index 8f19cbaf5a..470c588316 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/export.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/export.tt
@@ -131,7 +131,7 @@ $(document).ready(function() {
         Use a file
     </legend>
         <ol>
-        <li>File containing a list of biblio numbers with one biblio number per line. This list works as a filter: it is compatible with other parameters.</li>
+        <li>File containing a list of biblio numbers with one biblio number per line. This list works as a filter: it is compatible with other parameters. (File types accepted: .csv and .txt)</li>
         <li><label for="id_list_file">File: </label> <input type="file" id="id_list_file" name="id_list_file" /></li>
         </ol>
     </fieldset>
@@ -210,7 +210,7 @@ $(document).ready(function() {
         Use a file
     </legend>
         <ol>
-        <li>File containing a list of authids with one authid per line. This list works as a filter: it is compatible with other parameters.</li>
+        <li>File containing a list of authids with one authid per line. This list works as a filter: it is compatible with other parameters. (File types accepted: .csv and .txt)</li>
         <li><label for="id_list_file">File:</label> <input type="file" id="id_list_file" name="id_list_file" /></li>
         </ol>
     </fieldset>