diff --git a/Datastore/src/EntityIterator.php b/Datastore/src/EntityIterator.php
index dfd1adb78e5e..046f84c4c1c7 100644
--- a/Datastore/src/EntityIterator.php
+++ b/Datastore/src/EntityIterator.php
@@ -115,7 +115,7 @@ public function getExplainMetrics(): null|ExplainMetrics
         return $this->explainMetrics;
     }
 
-    private function gatherExplainMetrics(): null|explainMetrics
+    private function gatherExplainMetrics(): null|ExplainMetrics
     {
         $metrics = null;
         $this->pageIterator->current();