diff --git a/src/Query/EntityQuery.php b/src/Query/EntityQuery.php
index 5f585ee..4446e07 100644
--- a/src/Query/EntityQuery.php
+++ b/src/Query/EntityQuery.php
@@ -324,7 +324,7 @@ class EntityQuery extends SelectQuery
 	public function with(array $relations): static
 	{
 		// Normalize relations array and add them in the with array.
-		array_merge($this->with, EntityQuery::normalizeRelationsDefinition($relations));
+		$this->with = array_merge($this->with, EntityQuery::normalizeRelationsDefinition($relations));
 		return $this;
 	}