diff --git a/OpenRA.Mods.Common/Scripting/ScriptTriggers.cs b/OpenRA.Mods.Common/Scripting/ScriptTriggers.cs
index 9fbfd872d0..eedaa96d1d 100644
--- a/OpenRA.Mods.Common/Scripting/ScriptTriggers.cs
+++ b/OpenRA.Mods.Common/Scripting/ScriptTriggers.cs
@@ -127,7 +127,7 @@ namespace OpenRA.Mods.Common.Scripting
 			}
 		}
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			if (world.Disposing)
 				return;
diff --git a/OpenRA.Mods.Common/Traits/EjectOnDeath.cs b/OpenRA.Mods.Common/Traits/EjectOnDeath.cs
index 5216de1768..01f3c6e286 100644
--- a/OpenRA.Mods.Common/Traits/EjectOnDeath.cs
+++ b/OpenRA.Mods.Common/Traits/EjectOnDeath.cs
@@ -51,7 +51,7 @@ namespace OpenRA.Mods.Common.Traits
 			this.info = info;
 		}
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			if (self.Owner.WinState == WinState.Lost || !self.World.Map.Contains(self.Location))
 				return;
diff --git a/OpenRA.Mods.Common/Traits/GivesExperience.cs b/OpenRA.Mods.Common/Traits/GivesExperience.cs
index b92eeac946..48c055c17c 100644
--- a/OpenRA.Mods.Common/Traits/GivesExperience.cs
+++ b/OpenRA.Mods.Common/Traits/GivesExperience.cs
@@ -41,7 +41,7 @@ namespace OpenRA.Mods.Common.Traits
 			this.info = info;
 		}
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			if (e.Attacker == null || e.Attacker.Disposed)
 				return;
diff --git a/OpenRA.Mods.Common/Traits/Player/PlayerStatistics.cs b/OpenRA.Mods.Common/Traits/Player/PlayerStatistics.cs
index 93d52572fa..99a299f3bf 100644
--- a/OpenRA.Mods.Common/Traits/Player/PlayerStatistics.cs
+++ b/OpenRA.Mods.Common/Traits/Player/PlayerStatistics.cs
@@ -110,7 +110,7 @@ namespace OpenRA.Mods.Common.Traits
 
 	public class UpdatesPlayerStatistics : INotifyKilled
 	{
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			if (self.Owner.WinState != WinState.Undefined)
 				return;
diff --git a/OpenRA.Mods.Common/Traits/Render/WithDeathAnimation.cs b/OpenRA.Mods.Common/Traits/Render/WithDeathAnimation.cs
index 060f0056f8..9495aa15eb 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithDeathAnimation.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithDeathAnimation.cs
@@ -62,7 +62,7 @@ namespace OpenRA.Mods.Common.Traits.Render
 			rs = self.Trait<RenderSprites>();
 		}
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			// Actors with Crushable trait will spawn CrushedSequence.
 			if (crushed || IsTraitDisabled)
diff --git a/OpenRA.Mods.Common/Traits/ShakeOnDeath.cs b/OpenRA.Mods.Common/Traits/ShakeOnDeath.cs
index 354e5e5d02..5848198a1b 100644
--- a/OpenRA.Mods.Common/Traits/ShakeOnDeath.cs
+++ b/OpenRA.Mods.Common/Traits/ShakeOnDeath.cs
@@ -28,7 +28,7 @@ namespace OpenRA.Mods.Common.Traits
 			this.info = info;
 		}
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			self.World.WorldActor.Trait<ScreenShaker>().AddEffect(info.Intensity, self.CenterPosition, 1);
 		}
diff --git a/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs b/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs
index d6becfb015..9206aefc79 100644
--- a/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs
@@ -29,7 +29,7 @@ namespace OpenRA.Mods.Common.Traits.Sound
 			this.info = info;
 		}
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			var player = info.NotifyAll ? self.World.LocalPlayer : self.Owner;
 			Game.Sound.PlayNotification(self.World.Map.Rules, player, "Speech", info.Notification, self.Owner.Faction.InternalName);
diff --git a/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs b/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs
index cc9d2b81cc..06fc051254 100644
--- a/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs
@@ -36,7 +36,7 @@ namespace OpenRA.Mods.Common.Traits.Sound
 		public DeathSounds(DeathSoundsInfo info)
 			: base(info) { }
 
-		public void Killed(Actor self, AttackInfo e)
+		void INotifyKilled.Killed(Actor self, AttackInfo e)
 		{
 			if (IsTraitDisabled)
 				return;
diff --git a/OpenRA.Mods.Common/TraitsInterfaces.cs b/OpenRA.Mods.Common/TraitsInterfaces.cs
index d1ca0ef513..91c2376df5 100644
--- a/OpenRA.Mods.Common/TraitsInterfaces.cs
+++ b/OpenRA.Mods.Common/TraitsInterfaces.cs
@@ -85,6 +85,7 @@ namespace OpenRA.Mods.Common.Traits
 
 	[RequireExplicitImplementation]
 	public interface INotifyDamage { void Damaged(Actor self, AttackInfo e); }
+	[RequireExplicitImplementation]
 	public interface INotifyKilled { void Killed(Actor self, AttackInfo e); }
 	public interface INotifyAppliedDamage { void AppliedDamage(Actor self, Actor damaged, AttackInfo e); }