diff --git a/src/wp-admin/includes/class-ftp.php b/src/wp-admin/includes/class-ftp.php
index 81272f1ed3..4f75e409f8 100644
--- a/src/wp-admin/includes/class-ftp.php
+++ b/src/wp-admin/includes/class-ftp.php
@@ -444,7 +444,7 @@ class ftp_base {
 		}
 		if(!$this->_exec("MDTM ".$pathname, "mdtm")) return FALSE;
 		if(!$this->_checkCode()) return FALSE;
-		$mdtm = preg_replace("/^[0-9]{3} ([0-9]+).*$/", "\\1", $this->_message);
+		$mdtm = preg_replace("/^[0-9]{3} ([0-9]+).*$/s", "\\1", $this->_message);
 		$date = sscanf($mdtm, "%4d%2d%2d%2d%2d%2d");
 		$timestamp = mktime($date[3], $date[4], $date[5], $date[1], $date[2], $date[0]);
 		return $timestamp;