diff --git a/OpenRA.Mods.Common/UpdateRules/Rules/CopyIsometricSelectableHeight.cs b/OpenRA.Mods.Common/UpdateRules/Rules/CopyIsometricSelectableHeight.cs
index 48f96485e4..d42fc4de3c 100644
--- a/OpenRA.Mods.Common/UpdateRules/Rules/CopyIsometricSelectableHeight.cs
+++ b/OpenRA.Mods.Common/UpdateRules/Rules/CopyIsometricSelectableHeight.cs
@@ -63,8 +63,7 @@ namespace OpenRA.Mods.Common.UpdateRules.Rules
 			if (complete || actorNode.LastChildMatching("IsometricSelectable") != null)
 				yield break;
 
-			var height = 0;
-			if (!selectionHeight.TryGetValue(actorNode.Key.ToLowerInvariant(), out height))
+			if (!selectionHeight.TryGetValue(actorNode.Key.ToLowerInvariant(), out var height))
 				yield break;
 
 			// Don't redefine the default value