diff --git a/web/apps/photos/src/services/upload/uploadService.ts b/web/apps/photos/src/services/upload/uploadService.ts
index d6132b300..e208fd444 100644
--- a/web/apps/photos/src/services/upload/uploadService.ts
+++ b/web/apps/photos/src/services/upload/uploadService.ts
@@ -757,6 +757,10 @@ const areFilesSameHash = (f: Metadata, g: Metadata) => {
     }
 };
 
+/**
+ * Older files that were uploaded before we introduced hashing will not have
+ * hashes, so retain and use the logic we used back then for such files.
+ */
 const areFilesSameNoHash = (f: Metadata, g: Metadata) => {
     /*
      * The maximum difference in the creation/modification times of two similar