diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index d0a4e40701..6b649f28c7 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -129,7 +129,7 @@ namespace OpenRA.Traits
 	public interface INotifySold { void Selling(Actor self); void Sold(Actor self); }
 	public interface INotifyDamage { void Damaged(Actor self, AttackInfo e); }
 	public interface INotifyDamageStateChanged { void DamageStateChanged(Actor self, AttackInfo e); }
-	public interface INotifyRepair { void Repairing(Actor self, Actor host); }
+	public interface INotifyRepair { void Repairing(Actor self, Actor target); }
 	public interface INotifyKilled { void Killed(Actor self, AttackInfo e); }
 	public interface INotifyActorDisposing { void Disposing(Actor self); }
 	public interface INotifyAppliedDamage { void AppliedDamage(Actor self, Actor damaged, AttackInfo e); }
diff --git a/OpenRA.Mods.Common/Activities/Repair.cs b/OpenRA.Mods.Common/Activities/Repair.cs
index 7e147ccadf..cecd60b66a 100644
--- a/OpenRA.Mods.Common/Activities/Repair.cs
+++ b/OpenRA.Mods.Common/Activities/Repair.cs
@@ -74,7 +74,7 @@ namespace OpenRA.Mods.Common.Activities
 				self.InflictDamage(self, -hpToRepair, null);
 
 				foreach (var depot in host.TraitsImplementing<INotifyRepair>())
-					depot.Repairing(self, host);
+					depot.Repairing(host, self);
 
 				remainingTicks = repairsUnits.Interval;
 			}
diff --git a/OpenRA.Mods.Common/Traits/Render/WithRepairAnimation.cs b/OpenRA.Mods.Common/Traits/Render/WithRepairAnimation.cs
index e6aea22b8a..18cda57b94 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithRepairAnimation.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithRepairAnimation.cs
@@ -36,10 +36,10 @@ namespace OpenRA.Mods.Common.Traits.Render
 			spriteBody = self.TraitOrDefault<WithSpriteBody>();
 		}
 
-		public void Repairing(Actor self, Actor host)
+		public void Repairing(Actor self, Actor target)
 		{
 			if (buildComplete && spriteBody != null && !(info.PauseOnLowPower && self.IsDisabled()))
-				spriteBody.PlayCustomAnimation(host, info.Sequence, () => spriteBody.CancelCustomAnimation(host));
+				spriteBody.PlayCustomAnimation(self, info.Sequence, () => spriteBody.CancelCustomAnimation(self));
 		}
 
 		public void BuildingComplete(Actor self)