diff --git a/tensorflow/python/ops/math_ops.py b/tensorflow/python/ops/math_ops.py
index 6559929560c..3cd82d60417 100644
--- a/tensorflow/python/ops/math_ops.py
+++ b/tensorflow/python/ops/math_ops.py
@@ -736,10 +736,9 @@ def cast(x, dtype, name=None):
       values_cast = cast(x.values, base_type, name=name)
       return sparse_tensor.SparseTensor(x.indices, values_cast, x.dense_shape)
     else:
-      # TODO(touts): Handle what Josh said.
-      #
-      # Could return ops.convert_to_tensor(x, dtype=dtype, ...)  here, but that
-      # allows some conversions that cast() can't do, e.g.  casting numbers to
+      # TODO(josh11b): If x is not already a Tensor, we could return
+      # ops.convert_to_tensor(x, dtype=dtype, ...)  here, but that
+      # allows some conversions that cast() can't do, e.g. casting numbers to
       # strings.
       x = ops.convert_to_tensor(x, name="x")
       if x.dtype.base_dtype == base_type: