diff --git a/timm/models/davit.py b/timm/models/davit.py
index 444f21f3..17898160 100644
--- a/timm/models/davit.py
+++ b/timm/models/davit.py
@@ -113,7 +113,7 @@ class PatchEmbed(nn.Module):
                 padding=to_2tuple(pad))
             self.norm = nn.LayerNorm(in_chans)
 
-    def forward(self, x, size):
+    def forward(self, x, size: Tuple[int, int]):
         H, W = size
         dim = len(x.shape)
         if dim == 3:
@@ -186,7 +186,7 @@ class ChannelBlock(nn.Module):
                 hidden_features=mlp_hidden_dim,
                 act_layer=act_layer)
 
-    def forward(self, x, size):
+    def forward(self, x, size: Tuple[int, int]):
         x = self.cpe[0](x, size)
         cur = self.norm1(x)
         cur = self.attn(cur)
@@ -310,7 +310,7 @@ class SpatialBlock(nn.Module):
                 hidden_features=mlp_hidden_dim,
                 act_layer=act_layer)
 
-    def forward(self, x, size):
+    def forward(self, x, size: Tuple[int, int]):
         H, W = size
         B, L, C = x.shape
         assert L == H * W, "input feature has wrong size"