diff --git a/OpenRA.Game/GameRules/Warheads/AbsoluteSpreadDamageWarhead.cs b/OpenRA.Game/GameRules/Warheads/AbsoluteSpreadDamageWarhead.cs
index 223fb720d6..17a3398731 100644
--- a/OpenRA.Game/GameRules/Warheads/AbsoluteSpreadDamageWarhead.cs
+++ b/OpenRA.Game/GameRules/Warheads/AbsoluteSpreadDamageWarhead.cs
@@ -24,16 +24,7 @@ namespace OpenRA.GameRules
 		[Desc("What factor to multiply the Damage by for this spread range.", "Each factor specified must have an associated Spread defined.")]
 		public readonly float[] SpreadFactor = { 1f };
 
-		public override void DoImpact(Target target, Actor firedBy, float firepowerModifier)
-		{
-			// Used by traits that damage a single actor, rather than a position
-			if (target.Type == TargetType.Actor)
-				DoImpact(target.Actor, firedBy, firepowerModifier);
-			else
-				DoImpact(target.CenterPosition, firedBy, firepowerModifier);
-		}
-
-		public void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
 		{
 			var world = firedBy.World;
 
@@ -60,7 +51,7 @@ namespace OpenRA.GameRules
 			}
 		}
 
-		public void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
 		{
 			if (IsValidAgainst(victim, firedBy))
 			{
diff --git a/OpenRA.Game/GameRules/Warheads/DamageWarhead.cs b/OpenRA.Game/GameRules/Warheads/DamageWarhead.cs
index a20cbd7435..6ecaadabc0 100644
--- a/OpenRA.Game/GameRules/Warheads/DamageWarhead.cs
+++ b/OpenRA.Game/GameRules/Warheads/DamageWarhead.cs
@@ -55,5 +55,17 @@ namespace OpenRA.GameRules
 			float versus;
 			return Versus.TryGetValue(armor.Type, out versus) ? versus : 1f;
 		}
+
+		public override void DoImpact(Target target, Actor firedBy, float firepowerModifier)
+		{
+			// Used by traits that damage a single actor, rather than a position
+			if (target.Type == TargetType.Actor)
+				DoImpact(target.Actor, firedBy, firepowerModifier);
+			else
+				DoImpact(target.CenterPosition, firedBy, firepowerModifier);
+		}
+
+		public abstract void DoImpact(Actor target, Actor firedBy, float firepowerModifier);
+		public abstract void DoImpact(WPos pos, Actor firedBy, float firepowerModifier);
 	}
 }
diff --git a/OpenRA.Game/GameRules/Warheads/HealthPercentageDamageWarhead.cs b/OpenRA.Game/GameRules/Warheads/HealthPercentageDamageWarhead.cs
index fbbf802629..822a003786 100644
--- a/OpenRA.Game/GameRules/Warheads/HealthPercentageDamageWarhead.cs
+++ b/OpenRA.Game/GameRules/Warheads/HealthPercentageDamageWarhead.cs
@@ -21,16 +21,7 @@ namespace OpenRA.GameRules
 		[Desc("Size of the area. Damage will be applied to this area.", "If two spreads are defined, the area of effect is a ring, where the second value is the inner radius.")]
 		public readonly WRange[] Spread = { new WRange(43), WRange.Zero };
 
-		public override void DoImpact(Target target, Actor firedBy, float firepowerModifier)
-		{
-			// Used by traits that damage a single actor, rather than a position
-			if (target.Type == TargetType.Actor)
-				DoImpact(target.Actor, firedBy, firepowerModifier);
-			else
-				DoImpact(target.CenterPosition, firedBy, firepowerModifier);
-		}
-
-		public void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
 		{
 			var world = firedBy.World;
 			var range = Spread[0];
@@ -42,7 +33,7 @@ namespace OpenRA.GameRules
 				DoImpact(victim, firedBy, firepowerModifier);
 		}
 
-		public void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
 		{
 			if (IsValidAgainst(victim, firedBy))
 			{
diff --git a/OpenRA.Game/GameRules/Warheads/PerCellDamageWarhead.cs b/OpenRA.Game/GameRules/Warheads/PerCellDamageWarhead.cs
index 4641834223..5f0a370bea 100644
--- a/OpenRA.Game/GameRules/Warheads/PerCellDamageWarhead.cs
+++ b/OpenRA.Game/GameRules/Warheads/PerCellDamageWarhead.cs
@@ -21,16 +21,7 @@ namespace OpenRA.GameRules
 		[Desc("Size of the area. Damage will be applied to this area.")]
 		public readonly int[] Size = { 0, 0 };
 
-		public override void DoImpact(Target target, Actor firedBy, float firepowerModifier)
-		{
-			// Used by traits that damage a single actor, rather than a position
-			if (target.Type == TargetType.Actor)
-				DoImpact(target.Actor, firedBy, firepowerModifier);
-			else
-				DoImpact(target.CenterPosition, firedBy, firepowerModifier);
-		}
-
-		public void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
 		{
 			var world = firedBy.World;
 			var targetTile = world.Map.CellContaining(pos);
@@ -42,7 +33,7 @@ namespace OpenRA.GameRules
 					DoImpact(victim, firedBy, firepowerModifier);
 		}
 
-		public void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
 		{
 			if (IsValidAgainst(victim, firedBy))
 			{
diff --git a/OpenRA.Game/GameRules/Warheads/SpreadDamageWarhead.cs b/OpenRA.Game/GameRules/Warheads/SpreadDamageWarhead.cs
index f9af6ea087..150739b302 100644
--- a/OpenRA.Game/GameRules/Warheads/SpreadDamageWarhead.cs
+++ b/OpenRA.Game/GameRules/Warheads/SpreadDamageWarhead.cs
@@ -21,16 +21,7 @@ namespace OpenRA.GameRules
 		[Desc("For Normal DamageModel: Distance from the explosion center at which damage is 1/2.")]
 		public readonly WRange Spread = new WRange(43);
 
-		public override void DoImpact(Target target, Actor firedBy, float firepowerModifier)
-		{
-			// Used by traits that damage a single actor, rather than a position
-			if (target.Type == TargetType.Actor)
-				DoImpact(target.Actor, firedBy, firepowerModifier);
-			else
-				DoImpact(target.CenterPosition, firedBy, firepowerModifier);
-		}
-
-		public void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
 		{
 			var world = firedBy.World;
 			var maxSpread = new WRange((int)(Spread.Range * (float)Math.Log(Math.Abs(Damage), 2)));
@@ -44,7 +35,7 @@ namespace OpenRA.GameRules
 				}
 		}
 
-		public void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
+		public override void DoImpact(Actor victim, Actor firedBy, float firepowerModifier)
 		{
 			if (IsValidAgainst(victim, firedBy))
 			{