diff --git a/cake/libs/router.php b/cake/libs/router.php
index 37dca7eef..7b5fa06b7 100644
--- a/cake/libs/router.php
+++ b/cake/libs/router.php
@@ -153,7 +153,7 @@ class Router extends Overloadable {
 
 				if (preg_match('/^:(.+)$/', $element, $r)) {
 					if (isset($requirements[$r[1]])) {
-						$parsed[] = '(?:\/(' . $requirements[$r[1]] . '))?';
+						$parsed[] = '(?:\/(' . $requirements[$r[1]] . '))';
 					} else {
 						$parsed[] = '(?:\/([^\/]+))?';
 					}