diff --git a/fluid/neural_machine_translation/transformer/config.py b/fluid/neural_machine_translation/transformer/config.py
index 0ed38d9c043a62ac51ca8b8968a873d245382078..964b9243eb65e41afcaa29e943d5825440647807 100644
--- a/fluid/neural_machine_translation/transformer/config.py
+++ b/fluid/neural_machine_translation/transformer/config.py
@@ -1,5 +1,5 @@
 class TrainTaskConfig(object):
-    # only support GPU currently
+    # support both CPU and GPU now.
     use_gpu = True
     # the epoch number to train.
     pass_num = 30