diff --git a/CHANGELOG.md b/CHANGELOG.md
index 621af255a..5b6132168 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -67,6 +67,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix some sequential and scripted playout build failures when using playlists or marathons
 - Fix erasing playout items and history so all related data is also erased
   - This includes rerun history, unscheduled gaps, build status
+- Fix indexing collections when using Elasticsearch backend
 
 ## [26.1.1] - 2026-01-08
 ### Fixed
diff --git a/ErsatzTV.Infrastructure/Search/ElasticSearchIndex.cs b/ErsatzTV.Infrastructure/Search/ElasticSearchIndex.cs
index 7c79fc668..c15d00b9a 100644
--- a/ErsatzTV.Infrastructure/Search/ElasticSearchIndex.cs
+++ b/ErsatzTV.Infrastructure/Search/ElasticSearchIndex.cs
@@ -1011,6 +1011,8 @@ public class ElasticSearchIndex : ISearchIndex
 
     private static void AddCollections(ElasticSearchItem doc, IEnumerable<Collection> collections)
     {
+        doc.Collection ??= [];
+
         foreach (Collection collection in collections)
         {
             doc.Collection.Add(collection.Name);