diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/graph/collection/internal/DelayedCollectionInitializer.java b/hibernate-core/src/main/java/org/hibernate/sql/results/graph/collection/internal/DelayedCollectionInitializer.java
index 3dde0ef6ce..c3a4765163 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/graph/collection/internal/DelayedCollectionInitializer.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/graph/collection/internal/DelayedCollectionInitializer.java
@@ -8,6 +8,7 @@ package org.hibernate.sql.results.graph.collection.internal;
 
 import org.hibernate.collection.spi.CollectionSemantics;
 import org.hibernate.collection.spi.PersistentCollection;
+import org.hibernate.engine.spi.CollectionKey;
 import org.hibernate.engine.spi.PersistenceContext;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
 import org.hibernate.internal.log.LoggingHelper;
@@ -94,4 +95,20 @@ public class DelayedCollectionInitializer extends AbstractCollectionInitializer
 		super.finishUpRow( rowProcessingState );
 		collectionInstance = null;
 	}
+
+	@Override
+	public void resolveKey(RowProcessingState rowProcessingState) {
+		if ( collectionKey != null ) {
+			// already resolved
+			return;
+		}
+
+		final Object parentKey = parentAccess.getParentKey();
+		if ( parentKey != null ) {
+			collectionKey = new CollectionKey(
+					collectionAttributeMapping.getCollectionDescriptor(),
+					parentKey
+			);
+		}
+	}
 }