diff --git a/lib/plugins/authpdo/_test/sqlite.test.php b/lib/plugins/authpdo/_test/sqlite.test.php
index f9bcf637066aabd3ededb659b3f9881b0c48b613..e532567c1de997d3d348ab469ea23ce328aefb24 100644
--- a/lib/plugins/authpdo/_test/sqlite.test.php
+++ b/lib/plugins/authpdo/_test/sqlite.test.php
@@ -195,12 +195,12 @@ class sqlite_plugin_authpdo_test extends DokuWikiTest {
 
         $users = $auth->retrieveUsers(0, -1, array('group' => 'admin')); // full group
         $this->assertEquals(array($expect['admin'], $expect['tester']), $users);
-        $count = $auth->getUserCount(array('group' => 'admin'));
+        $count = $auth->getUserCount(array('grps' => 'admin'));
         $this->assertSame(2, $count);
 
         $users = $auth->retrieveUsers(0, -1, array('group' => 'dmi')); // substring
         $this->assertEquals(array($expect['admin'], $expect['tester']), $users);
-        $count = $auth->getUserCount(array('group' => 'dmi'));
+        $count = $auth->getUserCount(array('grps' => 'dmi'));
         $this->assertSame(2, $count);
 
         $users = $auth->retrieveUsers(0, -1, array('user' => 'dmi')); // substring
diff --git a/lib/plugins/authpdo/auth.php b/lib/plugins/authpdo/auth.php
index 836e599d77f763624e3131f63afa80332f867980..dfe125473d2e7b4ce20be7636ace2fcf50d1a6b4 100644
--- a/lib/plugins/authpdo/auth.php
+++ b/lib/plugins/authpdo/auth.php
@@ -401,6 +401,7 @@ class auth_plugin_authpdo extends DokuWiki_Auth_Plugin {
         if($limit < 0) $limit = 10000; // we don't support no limit
         if(is_null($filter)) $filter = array();
 
+        if(isset($filter['grps'])) $filter['group'] = $filter['grps'];
         foreach(array('user', 'name', 'mail', 'group') as $key) {
             if(!isset($filter[$key])) {
                 $filter[$key] = '%';
@@ -434,6 +435,7 @@ class auth_plugin_authpdo extends DokuWiki_Auth_Plugin {
     public function getUserCount($filter = array()) {
         if(is_null($filter)) $filter = array();
 
+        if(isset($filter['grps'])) $filter['group'] = $filter['grps'];
         foreach(array('user', 'name', 'mail', 'group') as $key) {
             if(!isset($filter[$key])) {
                 $filter[$key] = '%';