diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 3d53697edf..513c242936 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -35,10 +35,10 @@ function mysql2date($dateformatstring, $mysqlstring, $translate = true) {
 		$dateweekday = $weekday[date('w', $i)];
 		$dateweekday_abbrev = $weekday_abbrev[$dateweekday];
 		$dateformatstring = ' '.$dateformatstring;
-		$dateformatstring = preg_replace("/([^\\\])D/", "\\1".backslashit($dateweekday_abbrev), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])F/", "\\1".backslashit($datemonth), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])l/", "\\1".backslashit($dateweekday), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])M/", "\\1".backslashit($datemonth_abbrev), $dateformatstring);
+		$dateformatstring = preg_replace("/([^\\\])D/", "\${1}".backslashit($dateweekday_abbrev), $dateformatstring);
+		$dateformatstring = preg_replace("/([^\\\])F/", "\${1}".backslashit($datemonth), $dateformatstring);
+		$dateformatstring = preg_replace("/([^\\\])l/", "\${1}".backslashit($dateweekday), $dateformatstring);
+		$dateformatstring = preg_replace("/([^\\\])M/", "\${1}".backslashit($datemonth_abbrev), $dateformatstring);
 
 		$dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1);
 	}