diff --git a/timm/models/davit.py b/timm/models/davit.py
index 56e6e502..caa91707 100644
--- a/timm/models/davit.py
+++ b/timm/models/davit.py
@@ -39,7 +39,7 @@ class SequentialWithSize(nn.Sequential):
         super(SequentialWithSize, self).__init__(*args, **kwargs)
 
     def forward(self, x: Tensor, size: Tuple[int, int]):
-        for module in iter(self):
+        for module in self.__iter__():
             x, size = module(x, size)
             '''
             output = module(x, size)