diff --git a/docs/design_docs/datanode_flowgraph_recovery_design_0604_2021.md b/docs/design_docs/datanode_flowgraph_recovery_design_0604_2021.md
index acd2564d42..f832404035 100644
--- a/docs/design_docs/datanode_flowgraph_recovery_design_0604_2021.md
+++ b/docs/design_docs/datanode_flowgraph_recovery_design_0604_2021.md
@@ -24,7 +24,7 @@ When a flowgraph flushes a segment, we need to save these things:
 - all other segments' current positions from replica (If a segment hasn't been flushed, save the position when datanode first meets it.)
 
 Whether save successfully:
-- If successed, flowgraph updates all segments' positions to replica
+- If succeeded, flowgraph updates all segments' positions to replica
 - If not
     - For a grpc failure( this failure will appear after many times retry internally), crush itself.
     - For a normal failure, retry save 10 times, if fail still, crush itself.