diff --git a/PaddleCV/object_detection/configs/mask_rcnn_r50_1x.yml b/PaddleCV/object_detection/configs/mask_rcnn_r50_1x.yml
index 05968cc65765ad81fe408d8ba029dee938f5368d..09a5bd0efd68f8f9128bf3de9c0375dbb270ce79 100644
--- a/PaddleCV/object_detection/configs/mask_rcnn_r50_1x.yml
+++ b/PaddleCV/object_detection/configs/mask_rcnn_r50_1x.yml
@@ -22,7 +22,7 @@ MaskRCNN:
 
 ResNet:
   norm_type: affine_channel
-  norm_decay: true
+  norm_decay: 0.
   depth: 50
   feature_maps: 4
   freeze_at: 2