diff --git a/docs/design_docs/datanode_recovery_design_0513_2021.md b/docs/design_docs/datanode_recovery_design_0513_2021.md
index b958bf0542..719184a734 100644
--- a/docs/design_docs/datanode_recovery_design_0513_2021.md
+++ b/docs/design_docs/datanode_recovery_design_0513_2021.md
@@ -24,7 +24,7 @@ So what's DataNode's starting procedure?
 
 ## Objectives
 
-### 1. Serveice Registration
+### 1. Service Registration
 
 DataNode registers itself to etcd after grpc server started, in *INITIALIZING* state.