diff --git a/input/Manoonchai.json b/input/Manoonchai.json
index 02a6f64..4c17625 100644
--- a/input/Manoonchai.json
+++ b/input/Manoonchai.json
@@ -6,6 +6,7 @@
   "license": "MIT",
   "os": {
     "windows": {
+      "installerName": "ThaiMnc",
       "company": "Manoonchai",
       "localeId": "0000041e"
     }
diff --git a/main.ts b/main.ts
index 8dd1df5..1fb78b3 100644
--- a/main.ts
+++ b/main.ts
@@ -105,7 +105,7 @@ export async function generateKlc(
   }
 
   const lines = [
-    `KBD\t${layout.name}\t"${layout.language} ${layout.name} v${layout.version}"`,
+    `KBD\t${layout.os.windows.installerName}\t"${layout.language} ${layout.name} v${layout.version}"`,
     `COPYRIGHT\t"MIT"`,
     `COMPANY\t"${layout.os.windows.company}"`,
     `LOCALENAME\t"${klcLocales[layout.language]}"`,
@@ -132,12 +132,13 @@ export async function generateKlc(
 
   fs.writeFileSync(
     "./output/test.klc",
-    [
-      lines.join("\r\n\r\n"),
-      shiftStateLines.join("\r\n"),
-      layoutLines.join("\r\n"),
-      "ENDKBD",
-    ].join("\r\n\r\n"),
+    "\ufeff" +
+      [
+        lines.join("\r\n\r\n"),
+        shiftStateLines.join("\r\n"),
+        layoutLines.join("\r\n"),
+        "ENDKBD",
+      ].join("\r\n\r\n"),
     {
       encoding: "utf16le",
     }
@@ -434,5 +435,5 @@ export class Layout {
 }
 
 interface OSAttributes {
-  windows: { company: string; localeId: string }
+  windows: { company: string; localeId: string; installerName: string }
 }
diff --git a/output/test.klc b/output/test.klc
index 3810314..7a0a642 100644
Binary files a/output/test.klc and b/output/test.klc differ
diff --git a/test/main.test.ts b/test/main.test.ts
index 5d661cb..bb42eb5 100644
--- a/test/main.test.ts
+++ b/test/main.test.ts
@@ -433,7 +433,7 @@ describe("generateKlc", () => {
       .filter(Boolean)
 
     // Assert file headers
-    expect(lines[0]).toEqual(`KBD\tManoonchai\t"Thai Manoonchai v1.0"`)
+    expect(lines[0]).toEqual(`\ufeffKBD\tThaiMnc\t"Thai Manoonchai v1.0"`)
     expect(lines[1]).toEqual(`COPYRIGHT\t"MIT"`)
     expect(lines[2]).toEqual(`COMPANY\t"Manoonchai"`)
     expect(lines[3]).toEqual(`LOCALENAME\t"th-TH"`)