diff --git a/modules/entities/manage_listinstance.php b/modules/entities/manage_listinstance.php
index 60bea512510e1b0e13fe0ca740e7762df0cc3d5c..b2e25e60a82380fc6172411a5adebeef7404a191 100755
--- a/modules/entities/manage_listinstance.php
+++ b/modules/entities/manage_listinstance.php
@@ -1001,8 +1001,7 @@ $linkwithwhat =
         //******************************************************************************
         // LIST OF AVAILABLE USERS
         //******************************************************************************
-        if (count($users) > 0) {
-            $usersListDiff = array(); ?>
+        if (count($users) > 0) {  ?>
 			<div align="center">
 				<h3 class="tit"><?php echo _USERS_LIST; ?></h3>
 				<table cellpadding="0" cellspacing="0" border="0" class="listing spec">
@@ -1014,23 +1013,19 @@ $linkwithwhat =
 						</tr>
 					</thead><?php
                     $color = ' class="col"';
+
             foreach ($available_roles as $id => $label) {
                 $available_roles_ids[] = $id;
             }
 
-            foreach ($user_roles as $key => $value) {
-                $usersListDiff[] = $key;
-            }
-            for ($j = 0, $m = count($users);
-                        $j < $m;
-                        ++$j
-                    ) {
+
+            for ($j = 0, $m = count($users); $j < $m; ++$j) {
                 $user_id = $users[$j]['ID'];
                 $possible_roles = array();
 
-                if (!in_array($user_id, $usersListDiff)) {
-                    foreach ($roles as $role_id => $role_label) {
-                        if (in_array($role_id, $available_roles_ids) || $usergroups_controler->inGroup($users[$j]['ID'], $role_id)) {
+                foreach ($roles as $role_id => $role_label) {
+                    if (in_array($role_id, $available_roles_ids) || $usergroups_controler->inGroup($users[$j]['ID'], $role_id)) {
+                        if ($user_roles[$user_id] == null || !in_array($role_id, $user_roles[$user_id])) {
                             $possible_roles[$role_id] = $role_label;
                         }
                     }