diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index d3638f1941..6d9623245a 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -2132,7 +2132,7 @@ function bump_topic_allowed($forum_id, $topic_bumped, $last_post_time, $topic_po
 function get_context($text, $words, $length = 400)
 {
 	// first replace all whitespaces with single spaces
-	$text = preg_replace('/\s+/u', ' ', $text);
+	$text = preg_replace('/ +/', ' ', strtr($text, "\t\n\r\x0C ", '     '), $text);
 
 	$word_indizes = array();
 	if (sizeof($words))