diff --git a/src/SimpleCachingIteratorAggregate.php b/src/SimpleCachingIteratorAggregate.php
index 9caa9b7..b2d8f14 100644
--- a/src/SimpleCachingIteratorAggregate.php
+++ b/src/SimpleCachingIteratorAggregate.php
@@ -52,7 +52,7 @@ public function getIterator(): Iterator
                 yield $this->iterator->key() => $this->iterator->current();
             }
 
-            return $this;
+            return;
         }
 
         $this->iterator->next();