diff --git a/mod/data/lib.php b/mod/data/lib.php
index 012b5323f5b..85c507fa620 100644
--- a/mod/data/lib.php
+++ b/mod/data/lib.php
@@ -1674,7 +1674,7 @@ function data_print_preference_form($data, $perpage, $search, $sort='', $order='
     $patterns[]    = '/##firstname##/';
     $replacement[] = '<label class="accesshide" for="u_fn">'.get_string('authorfirstname', 'data').'</label><input type="text" size="16" id="u_fn" name="u_fn" value="'.$fn.'" />';
     $patterns[]    = '/##lastname##/';
-    $replacement[] = '<label for="u_ln">'.get_string('authorfirstname', 'data').'</label><input type="text" size="16" id="u_ln" name="u_ln" value="'.$ln.'" />';
+    $replacement[] = '<label class="accesshide" for="u_ln">'.get_string('authorlastname', 'data').'</label><input type="text" size="16" id="u_ln" name="u_ln" value="'.$ln.'" />';
 
     // actual replacement of the tags
     $newtext = preg_replace($patterns, $replacement, $data->asearchtemplate);