diff --git a/OpenRA.Mods.Common/Traits/SupportPowers/SupportPower.cs b/OpenRA.Mods.Common/Traits/SupportPowers/SupportPower.cs
index 7ca610dd0d..1da74bdeec 100644
--- a/OpenRA.Mods.Common/Traits/SupportPowers/SupportPower.cs
+++ b/OpenRA.Mods.Common/Traits/SupportPowers/SupportPower.cs
@@ -9,6 +9,8 @@
  */
 #endregion
 
+using System.Collections.Generic;
+using System.Linq;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
@@ -191,5 +193,17 @@ namespace OpenRA.Mods.Common.Traits
 			var speech = isAllied ? Info.LaunchSpeechNotification : Info.IncomingSpeechNotification;
 			Game.Sound.PlayNotification(Self.World.Map.Rules, toPlayer, "Speech", speech, toPlayer.Faction.InternalName);
 		}
+
+		public IEnumerable<CPos> CellsMatching(CPos location, string footprint, CVec dimensions)
+		{
+			var index = 0;
+			var fp = footprint.Where(c => !char.IsWhiteSpace(c)).ToArray();
+			var x = location.X - (dimensions.X - 1) / 2;
+			var y = location.Y - (dimensions.Y - 1) / 2;
+			for (var j = 0; j < dimensions.Y; j++)
+				for (var i = 0; i < dimensions.X; i++)
+					if (fp[index++] == 'x')
+						yield return new CPos(x + i, y + j);
+		}
 	}
 }