diff --git a/packages/abc/st/st-export.ts b/packages/abc/st/st-export.ts
index ec3a35a4b..d8ebf8d37 100644
--- a/packages/abc/st/st-export.ts
+++ b/packages/abc/st/st-export.ts
@@ -41,7 +41,7 @@ export class STExport {
       }
     }
 
-    ret.v = ret.v || '';
+    ret.v = ret.v ?? '';
 
     return ret;
   }