diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index 537ef15458..18f6fe4803 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -179,11 +179,6 @@ namespace OpenRA.Traits
 	public interface IDisabledTrait { bool IsTraitDisabled { get; } }
 	public interface IDisable { bool Disabled { get; } }
 
-	public interface IRadarSignature
-	{
-		IEnumerable<Pair<CPos, Color>> RadarSignatureCells(Actor self);
-	}
-
 	public interface IDefaultVisibilityInfo : ITraitInfoInterface { }
 	public interface IDefaultVisibility { bool IsVisible(Actor self, Player byPlayer); }
 	public interface IVisibilityModifier { bool IsVisible(Actor self, Player byPlayer); }
@@ -194,8 +189,6 @@ namespace OpenRA.Traits
 		bool HasFogVisibility();
 	}
 
-	public interface IRadarColorModifier { Color RadarColorOverride(Actor self, Color color); }
-
 	public interface ITargetableCells
 	{
 		IEnumerable<Pair<CPos, SubCell>> TargetableCells();
diff --git a/OpenRA.Mods.Common/TraitsInterfaces.cs b/OpenRA.Mods.Common/TraitsInterfaces.cs
index d6284a534c..30009d8907 100644
--- a/OpenRA.Mods.Common/TraitsInterfaces.cs
+++ b/OpenRA.Mods.Common/TraitsInterfaces.cs
@@ -10,6 +10,7 @@
 #endregion
 
 using System.Collections.Generic;
+using System.Drawing;
 using OpenRA.Activities;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Activities;
@@ -319,4 +320,11 @@ namespace OpenRA.Mods.Common.Traits
 		bool IsMovingVertically { get; set; }
 		bool CanEnterTargetNow(Actor self, Target target);
 	}
+
+	public interface IRadarSignature
+	{
+		IEnumerable<Pair<CPos, Color>> RadarSignatureCells(Actor self);
+	}
+
+	public interface IRadarColorModifier { Color RadarColorOverride(Actor self, Color color); }
 }