diff --git a/src/Offer/OfferIdentifierCollection.php b/src/Offer/OfferIdentifierCollection.php
index <HASH>..<HASH> 100644
--- a/src/Offer/OfferIdentifierCollection.php
+++ b/src/Offer/OfferIdentifierCollection.php
@@ -5,6 +5,7 @@ namespace CultuurNet\UDB3\Offer;
 use TwoDotsTwice\Collection\AbstractCollection;
 
 /**
+ * @method OfferIdentifierCollection with($item)
  * @method OfferIdentifierInterface[] toArray()
  */
 class OfferIdentifierCollection extends AbstractCollection
III-<I>: Docblock for better type hinting.