diff --git a/phpBB/includes/functions_content.php b/phpBB/includes/functions_content.php
index b1294a2f14..63e4a16fb6 100644
--- a/phpBB/includes/functions_content.php
+++ b/phpBB/includes/functions_content.php
@@ -691,6 +691,9 @@ function censor_text($text)
 		return '';
 	}
 
+	// Strip control characters
+	$text = preg_replace('/[\x00-\x0f]/', '', $text);
+
 	// We moved the word censor checks in here because we call this function quite often - and then only need to do the check once
 	if (!isset($censors) || !is_array($censors))
 	{