diff --git a/docs/design_docs/root_coordinator_recovery_on_power_failure.md b/docs/design_docs/root_coordinator_recovery_on_power_failure.md
index 54bb535a1c..f9ad534a0f 100644
--- a/docs/design_docs/root_coordinator_recovery_on_power_failure.md
+++ b/docs/design_docs/root_coordinator_recovery_on_power_failure.md
@@ -51,7 +51,7 @@
 
 ### 2.5 Flushed segment from `data node`
 
-1. Each time the `data node` finishes flushing a segment, it sends the segment id to the `RC` via msgstream.
+1. Each time the `DataNode` finishes flushing a segment, it sends the segment id to the `RootCoord` via msgstream.
 2. `RootCoord` needs to fetch binlog from `DataCoord` by id and send a request to `IndexCoord` to create an index on this segment.
 3. When the `IndexCoord` is called successfully, it will return a build id, and then `RootCoord` will update the build id to the `collection meta` and record the position of the msgstream in etcd.
 4. Step 3 is transactional and the operation will be successful only if the `collection meta` in etcd is updated.