diff --git a/phpBB/includes/acp/acp_database.php b/phpBB/includes/acp/acp_database.php
index 561e88bbbf..c7c794dfba 100644
--- a/phpBB/includes/acp/acp_database.php
+++ b/phpBB/includes/acp/acp_database.php
@@ -2354,4 +2354,4 @@ function fgetd_seekless(&$fp, $delim, $read, $seek, $eof, $buffer = 8192)
 	return false;
 }
 
-?>
+?>
\ No newline at end of file
diff --git a/phpBB/viewonline.php b/phpBB/viewonline.php
index ea9bd3c463..891b7e91e4 100644
--- a/phpBB/viewonline.php
+++ b/phpBB/viewonline.php
@@ -225,8 +225,9 @@ while ($row = $db->sql_fetchrow($result))
 				{
 					case 'posting':
 						preg_match('#mode=([a-z]+)#', $row['session_page'], $on_page);
+						$posting_mode = (!empty($on_page[1])) ? $on_page[1] : '';
 
-						switch ($on_page[1])
+						switch ($posting_mode)
 						{
 							case 'reply':
 							case 'quote':