diff --git a/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs b/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs
index 3d17112..7cc91c1 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs
@@ -124,7 +124,7 @@ public class SpotCardExchangeController : SVSimController
                 return BadRequest(new { error = "pre_release_limit_reached" });
         }
 
-        await using var tx = await _inv.BeginAsync(viewerId);
+        await using var tx = await _inv.BeginAsync(viewerId, configure: cfg => cfg.Source = GrantSource.GachaPointExchange);
 
         var rewardList = new List<RewardListEntry>();