diff --git a/mmpose/apis/webcam/nodes/model_nodes/pose_estimator_node.py b/mmpose/apis/webcam/nodes/model_nodes/pose_estimator_node.py
index 20e9864283..2af9bce3f5 100644
--- a/mmpose/apis/webcam/nodes/model_nodes/pose_estimator_node.py
+++ b/mmpose/apis/webcam/nodes/model_nodes/pose_estimator_node.py
@@ -128,8 +128,8 @@ def process(self, input_msgs):
                 object['keypoints'] = pred_instances.keypoints[0]
                 object['keypoint_scores'] = pred_instances.keypoint_scores[0]
 
-                dataset_meta = object.get('dataset_meta', dict())
-                dataset_meta.update(self.model.dataset_meta)
+                dataset_meta = self.model.dataset_meta.copy()
+                dataset_meta.update(object.get('dataset_meta', dict()))
                 object['dataset_meta'] = dataset_meta
                 object['pose_model_cfg'] = self.model.cfg