diff --git a/ppdet/modeling/heads/pico_head.py b/ppdet/modeling/heads/pico_head.py
index 07cc3c7ca7c93710bd41d49d810cbd6816bf3739..814d7d4e6159d330e1f2a99dc81c35aaf2ace97a 100644
--- a/ppdet/modeling/heads/pico_head.py
+++ b/ppdet/modeling/heads/pico_head.py
@@ -499,8 +499,8 @@ class PicoHeadV2(GFLHead):
         self.gfl_head_reg = None
         self.scales_regs = None
 
-        self.head_cls_list = []
-        self.head_reg_list = []
+        self.head_cls_list = nn.LayerList()
+        self.head_reg_list = nn.LayerList()
         self.cls_align = nn.LayerList()
 
         for i in range(len(fpn_stride)):