diff --git a/metnet/layers/ConvGRU.py b/metnet/layers/ConvGRU.py
index 1be2041..84432a7 100755
--- a/metnet/layers/ConvGRU.py
+++ b/metnet/layers/ConvGRU.py
@@ -189,7 +189,8 @@ def forward(self, input, hidden_state=None):
         input_tensor:
             5-D Tensor either of shape (t, b, c, h, w) or (b, t, c, h, w)
         hidden_state:
-        Returns
+
+        Returns:
         -------
         last_state_list, layer_output
         """