diff --git a/src/operator/tensor/broadcast_reduce_op_value.cc b/src/operator/tensor/broadcast_reduce_op_value.cc
index 861060514181..7e8a7f05659b 100644
--- a/src/operator/tensor/broadcast_reduce_op_value.cc
+++ b/src/operator/tensor/broadcast_reduce_op_value.cc
@@ -221,6 +221,8 @@ MXNET_OPERATOR_REGISTER_BROADCAST(broadcast_axis)
 Broadcasting is allowed on axes with size 1, such as from `(2,1,3,1)` to
 `(2,8,3,9)`. Elements will be duplicated on the broadcasted axes.
 
+`broadcast_axes` is an alias to the function `broadcast_axis`.
+
 Example::
 
    // given x of shape (1,2,1)