diff --git a/source/libs/sync/src/syncSnapshot.c b/source/libs/sync/src/syncSnapshot.c
index 9bc0a07d48..222b7c4e1e 100644
--- a/source/libs/sync/src/syncSnapshot.c
+++ b/source/libs/sync/src/syncSnapshot.c
@@ -192,7 +192,9 @@ int32_t snapshotSend(SSyncSnapshotSender *pSender) {
 
   // pMsg->privateTerm = pSender->privateTerm;
 
-  memcpy(pMsg->data, pSender->pCurrentBlock, pSender->blockLen);
+  if (pSender->pCurrentBlock != NULL) {
+    memcpy(pMsg->data, pSender->pCurrentBlock, pSender->blockLen);
+  }
 
   // send msg
   syncNodeSendMsgById(&pMsg->destId, pSender->pSyncNode, &rpcMsg);