diff --git a/.editorconfig b/.editorconfig
index 7fabc82cf4..f23e642f26 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -198,6 +198,9 @@ dotnet_diagnostic.IDE0060.severity = warning
 # Use expression body for local functions.
 dotnet_diagnostic.IDE0061.severity = warning
 
+# Simplify interpolation.
+dotnet_diagnostic.IDE0071.severity = warning
+
 # Naming rule violation.
 dotnet_diagnostic.IDE1006.severity = warning
 
diff --git a/OpenRA.Game/Input/Hotkey.cs b/OpenRA.Game/Input/Hotkey.cs
index 00ddaf428b..5b4fe62ad7 100644
--- a/OpenRA.Game/Input/Hotkey.cs
+++ b/OpenRA.Game/Input/Hotkey.cs
@@ -84,7 +84,7 @@ namespace OpenRA
 			return obj is Hotkey o && (Hotkey?)o == this;
 		}
 
-		public override string ToString() { return $"{Key} {Modifiers.ToString("F")}"; }
+		public override string ToString() { return $"{Key} {Modifiers:F}"; }
 
 		public string DisplayString()
 		{