diff --git a/src/CacheInclude.php b/src/CacheInclude.php
index ab75bf4..1b86b0f 100644
--- a/src/CacheInclude.php
+++ b/src/CacheInclude.php
@@ -53,10 +53,14 @@ class CacheInclude
      * @param ConfigInterface $config
      * @param bool $forceExpire
      */
-    public function __construct(ConfigInterface $config, $forceExpire = false)
+    public function __construct(ConfigInterface $config = null, $forceExpire = false)
     {
         $this->cache = Injector::inst()->get(CacheInterface::class . '.CacheInclude');
-        $this->config = $config;
+
+        if ($config) {
+            $this->config = $config;
+        }
+
         $this->forceExpire = $forceExpire;
     }