diff --git a/OpenRA.Game/Primitives/TypeDictionary.cs b/OpenRA.Game/Primitives/TypeDictionary.cs
index 4adcff58c8..52560f8f61 100644
--- a/OpenRA.Game/Primitives/TypeDictionary.cs
+++ b/OpenRA.Game/Primitives/TypeDictionary.cs
@@ -101,6 +101,7 @@ namespace OpenRA.Primitives
 
 		public void TrimExcess()
 		{
+			data.TrimExcess();
 			foreach (var objs in data.Values)
 				objs.TrimExcess();
 		}