diff --git a/src/diffusers/models/transformers/transformer_photon.py b/src/diffusers/models/transformers/transformer_photon.py
index 1a40a82971..c5809bc2c0 100644
--- a/src/diffusers/models/transformers/transformer_photon.py
+++ b/src/diffusers/models/transformers/transformer_photon.py
@@ -340,7 +340,7 @@ class Modulation(nn.Module):
         nn.init.constant_(self.lin.weight, 0)
         nn.init.constant_(self.lin.bias, 0)
 
-    def forward(self, vec: Tensor) -> tuple[tuple[Tensor, Tensor, Tensor], tuple[Tensor, Tensor, Tensor]]:
+    def forward(self, vec: Tensor) -> Tuple[Tuple[Tensor, Tensor, Tensor], Tuple[Tensor, Tensor, Tensor]]:
         out = self.lin(nn.functional.silu(vec))[:, None, :].chunk(6, dim=-1)
         return tuple(out[:3]), tuple(out[3:])