diff --git a/pages/Design-Patterns.md b/pages/Design-Patterns.md
index e284d6a..e82a61d 100644
--- a/pages/Design-Patterns.md
+++ b/pages/Design-Patterns.md
@@ -82,7 +82,7 @@ class Singleton
     {
         static $instance = null;
         if (null === $instance) {
-            $instance = new static;
+            $instance = new static();
         }
 
         return $instance;