diff --git a/OpenRA.Mods.Common/Traits/Radar/JamsRadar.cs b/OpenRA.Mods.Common/Traits/Radar/JamsRadar.cs
index f03b4c5233..8851059157 100644
--- a/OpenRA.Mods.Common/Traits/Radar/JamsRadar.cs
+++ b/OpenRA.Mods.Common/Traits/Radar/JamsRadar.cs
@@ -14,11 +14,24 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits.Radar
 {
 	[Desc("When an actor with this trait is in range of an actor with ProvidesRadar, it will temporarily disable the radar minimap for the enemy player.")]
-	public class JamsRadarInfo : TraitInfo<JamsRadar>
+	public class JamsRadarInfo : ITraitInfo
 	{
 		[Desc("Range for jamming.")]
 		public readonly WDist Range = WDist.Zero;
+
+		[Desc("Which diplomatic stances are affected.")]
+		public readonly Stance Stances = Stance.Enemy | Stance.Neutral;
+
+		public object Create(ActorInitializer init) { return new JamsRadar(this); }
 	}
 
-	public class JamsRadar { }
+	public class JamsRadar
+	{
+		public readonly JamsRadarInfo Info;
+
+		public JamsRadar(JamsRadarInfo info)
+		{
+			Info = info;
+		}
+	}
 }
diff --git a/OpenRA.Mods.Common/Traits/Radar/ProvidesRadar.cs b/OpenRA.Mods.Common/Traits/Radar/ProvidesRadar.cs
index 0ed0cf8ebc..eb6292e89f 100644
--- a/OpenRA.Mods.Common/Traits/Radar/ProvidesRadar.cs
+++ b/OpenRA.Mods.Common/Traits/Radar/ProvidesRadar.cs
@@ -28,9 +28,8 @@ namespace OpenRA.Mods.Common.Traits.Radar
 			// Check if powered
 			if (self.IsDisabled()) return false;
 
-			return self.World.ActorsWithTrait<JamsRadar>().All(a => a.Actor.Owner.Stances[self.Owner] == Stance.Ally
-				|| (self.CenterPosition - a.Actor.CenterPosition).HorizontalLengthSquared
-					> a.Actor.Info.TraitInfo<JamsRadarInfo>().Range.LengthSquared);
+			return self.World.ActorsWithTrait<JamsRadar>().All(a => !a.Trait.Info.Stances.HasStance(a.Actor.Owner.Stances[self.Owner])
+				|| (self.CenterPosition - a.Actor.CenterPosition).HorizontalLengthSquared > a.Trait.Info.Range.LengthSquared);
 		}
 	}
 }