diff --git a/ppdet/modeling/architectures/faster_rcnn.py b/ppdet/modeling/architectures/faster_rcnn.py
index 58d1e7978e3fc17356e7ce67c6b0d999909f435d..641ae0708bdda9be637861bfd29e43a6bc3b5bab 100644
--- a/ppdet/modeling/architectures/faster_rcnn.py
+++ b/ppdet/modeling/architectures/faster_rcnn.py
@@ -64,7 +64,7 @@ class FasterRCNN(object):
             gt_box = feed_vars['gt_box']
             is_crowd = feed_vars['is_crowd']
         else:
-            im_shape = feed_vars['im_info']
+            im_shape = feed_vars['im_shape']
         body_feats = self.backbone(im)
         body_feat_names = list(body_feats.keys())