diff --git a/lib/datalib.php b/lib/datalib.php
index e7377739999..7c78540cfbc 100644
--- a/lib/datalib.php
+++ b/lib/datalib.php
@@ -210,11 +210,14 @@ function search_users($courseid, $groupid, $searchtext, $sort='', $exceptions=''
  * @uses SITEID
  * @deprecated Use {@link get_course_users()} instead.
  * @param string $fields A comma separated list of fields to be returned from the chosen table.
+ * @param string $exceptions A comma separated list of user->id to be skiped in the result returned by the function
+ * @param int $limitfrom return a subset of records, starting at this point (optional, required if $limitnum is set).
+ * @param int $limitnum return a subset comprising this many records (optional, required if $limitfrom is set).
  * @return object|false  {@link $USER} records or false if error.
  */
-function get_site_users($sort='u.lastaccess DESC', $fields='*', $exceptions='') {
+function get_site_users($sort='u.lastaccess DESC', $fields='*', $exceptions='', $limitfrom='', $limitnum='') {
 
-    return get_course_users(SITEID, $sort, $exceptions, $fields);
+    return get_course_users(SITEID, $sort, $exceptions, $fields, $limitfrom, $limitnum);
 }
 
 
diff --git a/lib/deprecatedlib.php b/lib/deprecatedlib.php
index f024e6dc004..284ea84b9b5 100644
--- a/lib/deprecatedlib.php
+++ b/lib/deprecatedlib.php
@@ -773,12 +773,13 @@ function get_course_teachers($courseid, $sort='t.authority ASC', $exceptions='')
  *
  * @param int $courseid The course in question.
  * @param string $sort ?
- * @param string $exceptions ?
+ * @param string $exceptions A comma separated list of user->id to be skiped in the result returned by the function
  * @param string $fields A comma separated list of fields to be returned from the chosen table.
- * @return object
+ * @param int $limitfrom return a subset of records, starting at this point (optional, required if $limitnum is set).
+ * @param int $limitnum return a subset comprising this many records (optional, required if $limitfrom is set).
  * @todo Finish documenting this function
  */
-function get_course_users($courseid, $sort='ul.timeaccess DESC', $exceptions='', $fields='u.*, ul.timeaccess as lastaccess') {
+function get_course_users($courseid, $sort='ul.timeaccess DESC', $exceptions='', $fields='u.*, ul.timeaccess as lastaccess', $limitfrom='', $limitnum='') {
     global $CFG;
 
     $context = get_context_instance(CONTEXT_COURSE, $courseid);
@@ -803,11 +804,11 @@ function get_course_users($courseid, $sort='ul.timeaccess DESC', $exceptions='',
                 $fields = str_replace('u.', '', $fields);
                 $fields = str_replace('ul.', '', $fields);
                 $fields = str_replace('timeaccess', 'lastaccess', $fields);
-                return get_users(true, '', true, $exceptions, 'lastname ASC', '', '', '', '', $fields);
+                return get_users(true, '', true, $exceptions, 'lastname ASC', '', '', $limitfrom, $limitnum, $fields);
             }
         }
     }
-    return get_users_by_capability($context, 'moodle/course:view', $fields, $sort, '','','',$exceptions, false);
+    return get_users_by_capability($context, 'moodle/course:view', $fields, $sort, $limitfrom, $limitnum,'',$exceptions, false);
 
 }
 
@@ -1223,12 +1224,14 @@ function add_user_to_group($groupid, $userid) {
  * @uses $CFG
  * @param int $groupid The group in question.
  * @param string $sort ?
- * @param string $exceptions ?
- * @return object
+ * @param string $exceptions A comma separated list of user->id to be skiped in the result returned by the function
+ * @param string $fields A comma separated list of fields to be returned from the chosen table.
+ * @param int $limitfrom return a subset of records, starting at this point (optional, required if $limitnum is set).
+ * @param int $limitnum return a subset comprising this many records (optional, required if $limitfrom is set).
+ * @return array array of user objects
  * @todo Finish documenting this function
  */
-function get_group_users($groupid, $sort='u.lastaccess DESC', $exceptions='',
-                         $fields='u.*') {
+function get_group_users($groupid, $sort='u.lastaccess DESC', $exceptions='', $fields='u.*', $limitfrom='', $limitnum='') {
     global $CFG;
     if (!empty($exceptions)) {
         $except = ' AND u.id NOT IN ('. $exceptions .') ';
@@ -1247,7 +1250,8 @@ function get_group_users($groupid, $sort='u.lastaccess DESC', $exceptions='',
                                    {$CFG->prefix}groups_members m
                              WHERE m.groupid = '$groupid'
                                AND m.userid = u.id $except
-                          ORDER BY $sort");
+                          ORDER BY $sort",
+                          $limitfrom, $limitnum);
 }
 
 /**