diff --git a/lib/Cake/Cache/Cache.php b/lib/Cake/Cache/Cache.php
index 078f2f539..aa00f542d 100644
--- a/lib/Cake/Cache/Cache.php
+++ b/lib/Cake/Cache/Cache.php
@@ -278,7 +278,7 @@ class Cache {
  * @return void
  */
 	public static function gc($config = 'default', $expires = null) {
-		return static::$_engines[$config]->gc($expires);
+		return (bool)static::$_engines[$config]->gc($expires);
 	}
 
 /**