diff --git a/tailbone/static/js/tailbone.timesheet.edit.js b/tailbone/static/js/tailbone.timesheet.edit.js
index daf7e6d7..f2fcb271 100644
--- a/tailbone/static/js/tailbone.timesheet.edit.js
+++ b/tailbone/static/js/tailbone.timesheet.edit.js
@@ -183,6 +183,9 @@ function update_timetable() {
         var end_time = $(this).children('input[name|="edit_end_time"]').val();
         var shift = editing_day.children('.shift[data-uuid="' + uuid + '"]');
         if (! shift.length) {
+            if (! (start_time || end_time)) {
+                return;
+            }
             shift = $('<p class="shift" data-uuid="' + uuid + '"><span></span></p>');
             shift.append($('<input type="hidden" name="employee_uuid-' + uuid + '" value="'
                            + editing_day.parents('tr:first').data('employee-uuid') + '" />'));