diff --git a/osu.Game/Online/API/Requests/GetBeatmapsRequest.cs b/osu.Game/Online/API/Requests/GetBeatmapsRequest.cs
index c07e5ef1c2..22af022659 100644
--- a/osu.Game/Online/API/Requests/GetBeatmapsRequest.cs
+++ b/osu.Game/Online/API/Requests/GetBeatmapsRequest.cs
@@ -2,12 +2,13 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Collections.Generic;
 
 namespace osu.Game.Online.API.Requests
 {
     public class GetBeatmapsRequest : APIRequest<GetBeatmapsResponse>
     {
-        public readonly int[] BeatmapIds;
+        public readonly IReadOnlyList<int> BeatmapIds;
 
         private const int max_ids_per_request = 50;