diff --git a/services/context/src/widget_client.cpp b/services/context/src/widget_client.cpp
index 2a7431463e9734824ab20ba7c383b8bc722b0df2..dbb31f2fce3f69e367263d44dcca31248c376dbb 100644
--- a/services/context/src/widget_client.cpp
+++ b/services/context/src/widget_client.cpp
@@ -68,8 +68,8 @@ ResultCode WidgetClient::OnNotice(NoticeType type, const std::string &eventData)
     }
     IAM_LOGI("recv notice eventData: %{public}s", eventData.c_str());
     auto root = nlohmann::json::parse(eventData.c_str(), nullptr, false);
-    if (root.is_null() || root.is_discarded()) {
-        IAM_LOGE("OnNotice eventData is not json format");
+    if (root.is_null() || root.is_discarded() || !root.is_object()) {
+        IAM_LOGE("OnNotice eventData is not correct json format");
         return ResultCode::INVALID_PARAMETERS;
     }
     WidgetNotice notice = root.get<WidgetNotice>();