diff --git a/packages/dmg-builder/src/dmgLicense.ts b/packages/dmg-builder/src/dmgLicense.ts
index 66e6dc20e33..4b9b609cb0a 100644
--- a/packages/dmg-builder/src/dmgLicense.ts
+++ b/packages/dmg-builder/src/dmgLicense.ts
@@ -94,7 +94,7 @@ function getRtfUnicodeEscapedString(text: string) {
       result += text[i]
     }
     else {
-      result += `\\u${text.codePointAt(i)}`
+      result += `\\u${text.codePointAt(i)}?`
     }
   }
   return result
@@ -218,4 +218,4 @@ const regionCodes: any = {
   ne_NP: 106,
   kl: 107,
   en_IE: 108
-}
\ No newline at end of file
+}