diff --git a/developer/src/common/web/utils/src/types/ldml-keyboard/ldml-keyboard-xml.ts b/developer/src/common/web/utils/src/types/ldml-keyboard/ldml-keyboard-xml.ts
index cfff0fd433b..587b02dd719 100644
--- a/developer/src/common/web/utils/src/types/ldml-keyboard/ldml-keyboard-xml.ts
+++ b/developer/src/common/web/utils/src/types/ldml-keyboard/ldml-keyboard-xml.ts
@@ -38,7 +38,7 @@ export interface LKImport {
   /**
    * import base, currently `cldr` is supported
    */
-  base?: 'cldr';
+  base?: 'cldr' | '';
   /**
    * path to imported resource, of the form `45/*.xml`
    */