diff --git a/OpenRa.Game/Controller.cs b/OpenRa.Game/Controller.cs
index 0cf12c1cb3..1b7ea5dc03 100644
--- a/OpenRa.Game/Controller.cs
+++ b/OpenRa.Game/Controller.cs
@@ -26,8 +26,8 @@ namespace OpenRa.Game
 		{
 			if (orderGenerator == null) return;
 
-			var orders = orderGenerator.Order(xy.ToInt2(), mi).ToArray();
-			orders.Where(order => order.Validate());
+			var orders = orderGenerator.Order(xy.ToInt2(), mi)
+				.Where(order => order.Validate()).ToArray();
 			recentOrders.AddRange( orders );
 
 			var voicedActor = orders.Select(o => o.Subject)
diff --git a/OpenRa.Game/OpenRa.Game.csproj b/OpenRa.Game/OpenRa.Game.csproj
index 4f0bfbeb1e..20ad6b77ee 100644
--- a/OpenRa.Game/OpenRa.Game.csproj
+++ b/OpenRa.Game/OpenRa.Game.csproj
@@ -143,6 +143,7 @@
     <Compile Include="Traits\Activities\Idle.cs" />
     <Compile Include="Traits\Activities\Land.cs" />
     <Compile Include="Traits\Activities\Rearm.cs" />
+    <Compile Include="Traits\Activities\Repair.cs" />
     <Compile Include="Traits\Activities\ReturnToBase.cs" />
     <Compile Include="Traits\Activities\Teleport.cs" />
     <Compile Include="BuildingInfluenceMap.cs" />
diff --git a/OpenRa.Game/Traits/Activities/Repair.cs b/OpenRa.Game/Traits/Activities/Repair.cs
new file mode 100644
index 0000000000..fa3019f5bc
--- /dev/null
+++ b/OpenRa.Game/Traits/Activities/Repair.cs
@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits.Activities
+{
+	class Repair : IActivity
+	{
+		public IActivity NextActivity { get; set; }
+		bool isCanceled;
+		int remainingTicks = ticksPerPoint;
+
+		const int ticksPerPoint = 15;
+		const int hpPerPoint = 8;
+
+		public IActivity Tick(Actor self)
+		{
+			if (isCanceled) return NextActivity;
+			if (--remainingTicks == 0)
+			{
+				self.Health += hpPerPoint;
+				if (self.Health >= self.Info.Strength)
+				{
+					self.Health = self.Info.Strength;
+					return NextActivity;
+				}
+
+				var hostBuilding = Game.FindUnits(self.CenterLocation, self.CenterLocation)
+					.FirstOrDefault(a => a.traits.Contains<RenderBuilding>());
+
+				if (hostBuilding != null)
+					hostBuilding.traits.Get<RenderBuilding>().PlayCustomAnim(hostBuilding, "active" );
+
+				remainingTicks = ticksPerPoint;
+			}
+
+			return this;
+		}
+
+		public void Cancel(Actor self) { isCanceled = true; NextActivity = null; }
+	}
+}