diff --git a/src/UnitOfWork.php b/src/UnitOfWork.php
index 73aae2f362..f97dbeed7c 100644
--- a/src/UnitOfWork.php
+++ b/src/UnitOfWork.php
@@ -2968,7 +2968,7 @@ public function createEntity($className, array $data, &$hints = [])
             $oid    = spl_object_id($entity);
             $this->registerManaged($entity, $id, $data);
 
-            if (isset($hints[Query::HINT_READ_ONLY])) {
+            if (isset($hints[Query::HINT_READ_ONLY]) && true === $hints[Query::HINT_READ_ONLY]) {
                 $this->readOnlyObjects[$oid] = true;
             }
         }