diff --git a/OpenRA.Mods.Common/Traits/Air/Aircraft.cs b/OpenRA.Mods.Common/Traits/Air/Aircraft.cs
index 28e4a2411f..3cb03d2d7e 100644
--- a/OpenRA.Mods.Common/Traits/Air/Aircraft.cs
+++ b/OpenRA.Mods.Common/Traits/Air/Aircraft.cs
@@ -95,7 +95,7 @@ namespace OpenRA.Mods.Common.Traits
 				return WVec.Zero;
 
 			return self.World.FindActorsInCircle(self.CenterPosition, info.IdealSeparation)
-				.Where(a => !a.IsDead && a.HasTrait<Aircraft>())
+				.Where(a => !a.IsDead && a.HasTrait<Aircraft>() && a.Info.Traits.Get<AircraftInfo>().CruiseAltitude == info.CruiseAltitude)
 				.Select(GetRepulsionForce)
 				.Aggregate(WVec.Zero, (a, b) => a + b);
 		}