diff --git a/participant_invite.php b/participant_invite.php
index db5fb80f..903cf0fc 100644
--- a/participant_invite.php
+++ b/participant_invite.php
@@ -239,12 +239,15 @@ if( ($_POST['action']=="invitenew" || $_POST['action']=="inviteexisting") && $_P
 	 echo "<h2>".i18n("The following participants have been invited from your school")."</h2>\n";
  }
  echo "<table class=\"tableview\">\n";
+ echo "<thead>";
  echo "<tr><th>Username</th><th>Email Address</th><th>First Name</th><th>Last Name</th>";
  if($_SESSION['superuser']=="yes") {
 	 echo "<th>School</th>";
  }
  echo "<th>Actions</th>";
  echo "</tr>\n";
+ echo "</thead>";
+ echo "<tbody>";
  while($r=mysql_fetch_object($q)) {
 	 echo "<tr>";
 	 echo " <td>$r->username</td>";
@@ -269,6 +272,7 @@ if( ($_POST['action']=="invitenew" || $_POST['action']=="inviteexisting") && $_P
 	 echo "</tr>";
 
  }
+ echo "</tbody>";
  echo "</table>\n";
 
  send_footer();