diff --git a/src/View/SSViewer.php b/src/View/SSViewer.php
index b05f5439dc0..b7397f30c8b 100644
--- a/src/View/SSViewer.php
+++ b/src/View/SSViewer.php
@@ -167,7 +167,7 @@ class SSViewer implements Flushable
      *
      * @var array
      */
-    protected $subTemplates = null;
+    protected $subTemplates = [];
 
     /**
      * @var bool