diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/oai_set_mappings.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/oai_set_mappings.tt
index 67ac3c0ff9..66df9095e4 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/oai_set_mappings.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/oai_set_mappings.tt
@@ -81,9 +81,9 @@
                                         [% END %]
                                     </select>
                                     </td>
-                                    <td><input type="text" name="marcfield" size="3" value="[% mapping.marcfield | html %]" /></td>
-                                    <td><input type="text" name="marcsubfield" size="1" value="[% mapping.marcsubfield | html %]" /></td>
-                                    <td><select name=operator>
+                                    <td><input type="text" name="marcfield" size="3" maxlength="3" value="[% mapping.marcfield | html %]" /></td>
+                                    <td><input type="text" name="marcsubfield" size="1" maxlength="1" value="[% mapping.marcsubfield | html %]" /></td>
+                                    <td><select name="operator">
                                         [% IF mapping.operator == 'equal' %]
                                             <option value="equal" selected="selected">is equal to</option>
                                             <option value="notequal">not equal to</option>
@@ -92,7 +92,7 @@
                                             <option value="notequal" selected="selected">not equal to</option>
                                         [% END %]
                                         </select></td>
-                                    <td><input type="text" name="marcvalue" value="[% mapping.marcvalue | html %]" /></td>
+                                    <td><input type="text" name="marcvalue" maxlength="80" value="[% mapping.marcvalue | html %]" /></td>
                                     <td>
                                         [% IF ( loop.last ) %]
                                             <button type="button" id="new_rule_button" class="btn btn-default btn-xs" title="Add another condition"><i class="fa fa-plus"></i> Add</button>
@@ -119,7 +119,7 @@
                                 </td>
                                 <td><input type="text" name="marcfield" size="3" /></td>
                                 <td><input type="text" name="marcsubfield" size="1" /></td>
-                                <td><select name=operator>
+                                <td><select name="operator">
                                     <option value="equal">is equal to</option>
                                     <option value="notequal">not equal to</option>
                                     </select></td>