diff --git a/backend/src/Squidex.Domain.Apps.Entities/Assets/AssetUsageTracker_EventHandling.cs b/backend/src/Squidex.Domain.Apps.Entities/Assets/AssetUsageTracker_EventHandling.cs
index bac012832..22da3f66e 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Assets/AssetUsageTracker_EventHandling.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Assets/AssetUsageTracker_EventHandling.cs
@@ -47,7 +47,7 @@ namespace Squidex.Domain.Apps.Entities.Assets
                     return UpdateSizeAsync(e.AppId.Id, GetDate(@event), e.FileSize, 0);
 
                 case AssetDeleted e:
-                    return UpdateSizeAsync(e.AppId.Id, GetDate(@event), e.DeletedSize, -1);
+                    return UpdateSizeAsync(e.AppId.Id, GetDate(@event), -e.DeletedSize, -1);
             }
 
             return Task.CompletedTask;