diff --git a/src/utils/key-in-object.ts b/src/utils/key-in-object.ts
index 4fb0ff8..8873fec 100644
--- a/src/utils/key-in-object.ts
+++ b/src/utils/key-in-object.ts
@@ -6,7 +6,7 @@ export default function keyInObject(obj: any, key: string): boolean {
   }
 
   if (!keys.length) {
-    return !!obj[baseKey];
+    return baseKey in obj;
   }
 
   let value = obj[baseKey];