diff --git a/mmdet/models/losses/iou_loss.py b/mmdet/models/losses/iou_loss.py
index 8c9d602f0b72f3c48b70a99ed62cb2f8555528fa..edff11b0eb1b0f71d7a49278b209fe36c0bae3f9 100644
--- a/mmdet/models/losses/iou_loss.py
+++ b/mmdet/models/losses/iou_loss.py
@@ -19,6 +19,7 @@ class IoULoss(nn.Module):
             pred,
             target,
             weight,
+            style=self.style,
             beta=self.beta,
             eps=self.eps,
             *args,