diff --git a/src/data/bedrock/item/ItemDeserializer.php b/src/data/bedrock/item/ItemDeserializer.php
index da96f4ffe..ef3bee2a0 100644
--- a/src/data/bedrock/item/ItemDeserializer.php
+++ b/src/data/bedrock/item/ItemDeserializer.php
@@ -58,7 +58,7 @@ final class ItemDeserializer{
 	 * Returns the existing data deserializer for the given ID, or null if none exists.
 	 * This may be useful if you need to override a deserializer, but still want to be able to fall back to the original.
 	 *
-	 * @phpstan-return \Closure(Data) : Item
+	 * @phpstan-return ?\Closure(Data) : Item
 	 */
 	public function getDeserializerForId(string $id) : ?\Closure{
 		return $this->deserializers[$id] ?? null;