diff --git a/CloudObjects/SDK/CloudObject.php b/CloudObjects/SDK/CloudObject.php
index bf5b1e4..55d01f6 100644
--- a/CloudObjects/SDK/CloudObject.php
+++ b/CloudObjects/SDK/CloudObject.php
@@ -32,11 +32,13 @@ class CloudObject {
      * Specify a custom NodeReader to use for this CloudObject.
      * If not set, a default NodeReader will be used.
      */
-    public function setReader(NodeReader $reader) {
+    public function setReader(NodeReader $reader) : self {
         $this->reader = $reader;
+
+        return $this;
     }
 
-    private function getReader() {
+    private function getReader() : NodeReader {
         if (!$this->reader) {
             $this->reader = new NodeReader;
         }