diff --git a/source/libs/sync/inc/syncInt.h b/source/libs/sync/inc/syncInt.h
index dba2266285b33ba4b3e56548e62d7c5a75827998..10218f69e6a7b1e7dedba0837340595bfad69a8d 100644
--- a/source/libs/sync/inc/syncInt.h
+++ b/source/libs/sync/inc/syncInt.h
@@ -58,6 +58,8 @@ typedef struct SSyncRespMgr           SSyncRespMgr;
 typedef struct SSyncSnapshotSender    SSyncSnapshotSender;
 typedef struct SSyncSnapshotReceiver  SSyncSnapshotReceiver;
 
+extern bool gRaftDetailLog;
+
 typedef struct SSyncNode {
   // init by SSyncInfo
   SyncGroupId vgId;
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index d549e3bd9d52679904f802c0f3f6eb43a8a427bd..fe4ff61aad6d223949f9a420a45d144505fe83bc 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -35,6 +35,8 @@
 #include "syncVoteMgr.h"
 #include "tref.h"
 
+bool gRaftDetailLog = false;
+
 static int32_t tsNodeRefId = -1;
 
 // ------ local funciton ---------
@@ -1203,6 +1205,16 @@ void syncNodeBecomeLeader(SSyncNode* pSyncNode) {
     pSyncNode->pMatchIndex->index[i] = SYNC_INDEX_INVALID;
   }
 
+  // update sender private term
+  SSyncSnapshotSender* pMySender = syncNodeGetSnapshotSender(pSyncNode, &(pSyncNode->myRaftId));
+  ASSERT(pMySender != NULL);
+  for (int i = 0; i < pSyncNode->pMatchIndex->replicaNum; ++i) {
+    if ((pSyncNode->senders)[i]->privateTerm > pMySender->privateTerm) {
+      pMySender->privateTerm = (pSyncNode->senders)[i]->privateTerm;
+    }
+  }
+  (pMySender->privateTerm) += 100;
+
   // stop elect timer
   syncNodeStopElectTimer(pSyncNode);