diff --git a/torch/_torch_docs.py b/torch/_torch_docs.py
index 6710b5811eeaf..8b18915837ebb 100644
--- a/torch/_torch_docs.py
+++ b/torch/_torch_docs.py
@@ -2308,7 +2308,7 @@ def merge_dicts(*dicts):
 
 Concatenates the given sequence of :attr:`seq` tensors in the given dimension.
 All tensors must either have the same shape (except in the concatenating
-dimension) or be empty.
+dimension) or be a 1-D empty tensor with size ``(0,)``.
 
 :func:`torch.cat` can be seen as an inverse operation for :func:`torch.split`
 and :func:`torch.chunk`.