diff --git a/OpenRA.Game/Actor.cs b/OpenRA.Game/Actor.cs
index 47a3364e38..d32329164d 100644
--- a/OpenRA.Game/Actor.cs
+++ b/OpenRA.Game/Actor.cs
@@ -377,7 +377,7 @@ namespace OpenRA
 		public BitSet<TargetableType> GetAllTargetTypes()
 		{
 			// PERF: Avoid LINQ.
-			var targetTypes = new BitSet<TargetableType>();
+			var targetTypes = default(BitSet<TargetableType>);
 			foreach (var targetable in Targetables)
 				targetTypes = targetTypes.Union(targetable.TargetTypes);
 			return targetTypes;
@@ -386,7 +386,7 @@ namespace OpenRA
 		public BitSet<TargetableType> GetEnabledTargetTypes()
 		{
 			// PERF: Avoid LINQ.
-			var targetTypes = new BitSet<TargetableType>();
+			var targetTypes = default(BitSet<TargetableType>);
 			foreach (var targetable in Targetables)
 				if (targetable.IsTraitEnabled())
 					targetTypes = targetTypes.Union(targetable.TargetTypes);
diff --git a/OpenRA.Game/GameRules/ActorInfo.cs b/OpenRA.Game/GameRules/ActorInfo.cs
index 4919f2d76d..b96c8bfe54 100644
--- a/OpenRA.Game/GameRules/ActorInfo.cs
+++ b/OpenRA.Game/GameRules/ActorInfo.cs
@@ -155,7 +155,7 @@ namespace OpenRA
 		public BitSet<TargetableType> GetAllTargetTypes()
 		{
 			// PERF: Avoid LINQ.
-			var targetTypes = new BitSet<TargetableType>();
+			var targetTypes = default(BitSet<TargetableType>);
 			foreach (var targetable in TraitInfos<ITargetableInfo>())
 				targetTypes = targetTypes.Union(targetable.GetTargetTypes());
 			return targetTypes;
diff --git a/OpenRA.Mods.Cnc/Traits/Infiltration/Infiltrates.cs b/OpenRA.Mods.Cnc/Traits/Infiltration/Infiltrates.cs
index 9245e6fafc..2b35ebb45e 100644
--- a/OpenRA.Mods.Cnc/Traits/Infiltration/Infiltrates.cs
+++ b/OpenRA.Mods.Cnc/Traits/Infiltration/Infiltrates.cs
@@ -75,7 +75,7 @@ namespace OpenRA.Mods.Cnc.Traits
 			if (IsTraitDisabled)
 				return false;
 
-			var targetTypes = new BitSet<TargetableType>();
+			var targetTypes = default(BitSet<TargetableType>);
 			if (order.Target.Type == TargetType.FrozenActor)
 				targetTypes = order.Target.FrozenActor.TargetTypes;