diff --git a/OpenRA.Mods.Common/Traits/Player/ProductionQueue.cs b/OpenRA.Mods.Common/Traits/Player/ProductionQueue.cs
index 632b7a7b57..651b806920 100644
--- a/OpenRA.Mods.Common/Traits/Player/ProductionQueue.cs
+++ b/OpenRA.Mods.Common/Traits/Player/ProductionQueue.cs
@@ -216,7 +216,7 @@ namespace OpenRA.Mods.Common.Traits
 			return queue.ElementAtOrDefault(0);
 		}
 
-		public IEnumerable<ProductionItem> AllQueued()
+		public virtual IEnumerable<ProductionItem> AllQueued()
 		{
 			return queue;
 		}