diff --git a/plugins/kolab_auth/kolab_auth.php b/plugins/kolab_auth/kolab_auth.php
index 0d260bb6..27c7b563 100644
--- a/plugins/kolab_auth/kolab_auth.php
+++ b/plugins/kolab_auth/kolab_auth.php
@@ -115,11 +115,11 @@ class kolab_auth extends rcube_plugin
         }
 
         foreach ($role_plugins as $role_dn => $plugins) {
-            $role_plugins[$ldap->parse_vars($role_dn)] => $plugins;
+            $role_plugins[$ldap->parse_vars($role_dn)] = $plugins;
         }
 
         foreach ($role_settings as $role_dn => $settings) {
-            $role_settings[$ldap->parse_vars($role_dn)] => $settings;
+            $role_settings[$ldap->parse_vars($role_dn)] = $settings;
         }
 
         foreach ($role_dns as $role_dn) {