diff --git a/src/collection/collectionmodel.cpp b/src/collection/collectionmodel.cpp
index 43f902693..386eb9323 100644
--- a/src/collection/collectionmodel.cpp
+++ b/src/collection/collectionmodel.cpp
@@ -719,7 +719,7 @@ void CollectionModel::AlbumCoverLoaded(const quint64 id, const AlbumCoverLoaderR
       disk_cache_metadata.setSaveToDisk(true);
       disk_cache_metadata.setUrl(disk_cache_key);
       // Qt 6 now ignores any entry without headers, so add a fake header.
-      disk_cache_metadata.setRawHeaders(QNetworkCacheMetaData::RawHeaderList() << qMakePair(QByteArray(), QByteArray()));
+      disk_cache_metadata.setRawHeaders(QNetworkCacheMetaData::RawHeaderList() << qMakePair(QByteArray("collection-thumbnail"), cache_key.toUtf8()));
       QIODevice *device_iconcache = sIconCache->prepare(disk_cache_metadata);
       if (device_iconcache) {
         result.image_scaled.save(device_iconcache, "XPM");