diff --git a/doc/design/cluster_train/pserver_client.md b/doc/design/cluster_train/pserver_client.md
index 500894fac76ab828e3926b5ef9586b4374f2cf10..392bab25e9de6bf5aa7cc1b0ad345ef12f1d9e5d 100644
--- a/doc/design/cluster_train/pserver_client.md
+++ b/doc/design/cluster_train/pserver_client.md
@@ -4,7 +4,7 @@ For an overview of trainer's role, please refer to [distributed training design
 
 ## Parameter Partition
 
-Each parameter will be partitioned into parameter chunks to make the parameters evenly distributed on parameter servers. The partition is done automatically by the client library. The *sparse parameter* require a little different treatment:
+Each parameter will be partitioned into parameter blocks to make the parameters evenly distributed on parameter servers. The partition is done automatically by the client library. The *sparse parameter* require a little different treatment:
 
 ### Sparse Parameter