diff --git a/.editorconfig b/.editorconfig
index 871961fb8c..647016dbb2 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1064,6 +1064,9 @@ dotnet_diagnostic.RCS1179.severity = warning
 # Use constant instead of field.
 dotnet_diagnostic.RCS1187.severity = warning
 
+# Join string expressions.
+dotnet_diagnostic.RCS1190.severity = warning
+
 # Overriding member should not change 'params' modifier.
 dotnet_diagnostic.RCS1193.severity = warning
 
diff --git a/OpenRA.Game/Support/LaunchArguments.cs b/OpenRA.Game/Support/LaunchArguments.cs
index 19d01935af..a529a9818c 100644
--- a/OpenRA.Game/Support/LaunchArguments.cs
+++ b/OpenRA.Game/Support/LaunchArguments.cs
@@ -37,8 +37,8 @@ namespace OpenRA
 				return;
 
 			foreach (var f in GetType().GetFields())
-				if (args.Contains("Launch" + "." + f.Name))
-					FieldLoader.LoadField(this, f.Name, args.GetValue("Launch" + "." + f.Name, ""));
+				if (args.Contains("Launch." + f.Name))
+					FieldLoader.LoadField(this, f.Name, args.GetValue("Launch." + f.Name, ""));
 		}
 
 		public ConnectionTarget GetConnectEndPoint()