diff --git a/mmdet/models/dense_heads/rtmdet_ins_head.py b/mmdet/models/dense_heads/rtmdet_ins_head.py
index 261a57fe485..5023e559c7e 100644
--- a/mmdet/models/dense_heads/rtmdet_ins_head.py
+++ b/mmdet/models/dense_heads/rtmdet_ins_head.py
@@ -917,7 +917,7 @@ def _init_layers(self) -> None:
                         norm_cfg=self.norm_cfg,
                         act_cfg=self.act_cfg))
             self.cls_convs.append(cls_convs)
-            self.reg_convs.append(cls_convs)
+            self.reg_convs.append(reg_convs)
             self.kernel_convs.append(kernel_convs)
 
             self.rtm_cls.append(