diff --git a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
index 15d1222d00..dd01683c51 100644
--- a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
+++ b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
@@ -79,6 +79,7 @@
     </radio_group>
 
     <check_box
+     control_name="AllowMultipleViewers"
      follows="top|left"
      height="15"
      label="Allow Multiple Viewer"