diff --git a/packages/uni-mp-core/src/api/protocols/enhanceSystemInfo.ts b/packages/uni-mp-core/src/api/protocols/enhanceSystemInfo.ts
index e34bf069abf866ec221d8766e36613ccb8c9efef..44dbc0b15b801230efa5a37411c0a753a7f2c5e2 100644
--- a/packages/uni-mp-core/src/api/protocols/enhanceSystemInfo.ts
+++ b/packages/uni-mp-core/src/api/protocols/enhanceSystemInfo.ts
@@ -49,10 +49,10 @@ export function populateParameters(
   toRes: UniApp.GetSystemInfoResult
 ) {
   const {
-    brand,
-    model,
-    system,
-    language,
+    brand = '',
+    model = '',
+    system = '',
+    language = '',
     theme,
     version,
     hostName,