diff --git a/indra/newview/skins/default/xui/en/panel_group_notices.xml b/indra/newview/skins/default/xui/en/panel_group_notices.xml
index e096715ceec0c5f47d37beac01c93157aa0f8988..0d9c2c216275ccb104f8dfe387b3d8d744f0b588 100644
--- a/indra/newview/skins/default/xui/en/panel_group_notices.xml
+++ b/indra/newview/skins/default/xui/en/panel_group_notices.xml
@@ -136,6 +136,7 @@ Maximum 200 per group daily
          left_pad="3"
          max_length="63"
          name="create_subject"
+         prevalidate_callback="ascii"
          width="220" />
         <text
          follows="left|top"