diff --git a/OpenRa.Game/OpenRa.Game.csproj b/OpenRa.Game/OpenRa.Game.csproj
index 09df0ab8cb..4b20c55894 100644
--- a/OpenRa.Game/OpenRa.Game.csproj
+++ b/OpenRa.Game/OpenRa.Game.csproj
@@ -212,7 +212,6 @@
     <Compile Include="Traits\Explodes.cs" />
     <Compile Include="Traits\Fake.cs" />
     <Compile Include="Traits\GeneratesGap.cs" />
-    <Compile Include="Traits\GpsLaunchSite.cs" />
     <Compile Include="Traits\GpsPower.cs" />
     <Compile Include="Traits\Harvester.cs" />
     <Compile Include="Traits\Helicopter.cs" />
diff --git a/OpenRa.Game/Traits/GpsLaunchSite.cs b/OpenRa.Game/Traits/GpsLaunchSite.cs
deleted file mode 100644
index f5401863bc..0000000000
--- a/OpenRa.Game/Traits/GpsLaunchSite.cs
+++ /dev/null
@@ -1,7 +0,0 @@
-using OpenRa.Effects;
-
-namespace OpenRa.Traits
-{
-	class GpsLaunchSiteInfo : StatelessTraitInfo<GpsLaunchSite> { }
-	class GpsLaunchSite { }
-}
diff --git a/OpenRa.Game/Traits/GpsPower.cs b/OpenRa.Game/Traits/GpsPower.cs
index 425d2120c7..4f1908c8e8 100644
--- a/OpenRa.Game/Traits/GpsPower.cs
+++ b/OpenRa.Game/Traits/GpsPower.cs
@@ -38,4 +38,8 @@ namespace OpenRa.Traits
 			FinishActivate();
 		}
 	}
+
+	// tag trait to identify the building
+	class GpsLaunchSiteInfo : StatelessTraitInfo<GpsLaunchSite> { }
+	class GpsLaunchSite { }
 }