diff --git a/src/Setup.cs b/src/Setup.cs
index e95b66f..450c2ea 100644
--- a/src/Setup.cs
+++ b/src/Setup.cs
@@ -421,7 +421,11 @@ public class Setup {
 		if (!SkipShim) {
 			InstallFile(shimSource, loaderDest);
 			InstallFile(mmSource, $"mm{EfiArch}.efi");
-			InstallFile(loaderSource, "\u4957\u444e\u574f\u0053\u0058"); // bytes "WINDOWS\0X\0" as UTF-16
+			var shimContents = File.ReadAllBytes(shimSource);
+			var shimContentsStr = System.Text.Encoding.ASCII.GetString(shimContents);
+			if (shimContentsStr.IndexOf("Version: 15.") >= 0) {
+				InstallFile(loaderSource, "\u4957\u444e\u574f\u0053\u0058"); // bytes "WINDOWS\0X\0" as UTF-16
+			}
 			loaderDest = $"grub{EfiArch}.efi";
 		}
 		InstallFile(loaderSource, loaderDest);