diff --git a/src/sync/src/syncRetrieve.c b/src/sync/src/syncRetrieve.c
index b3908d2c576d8fead0a2d3dd14a613f946ea5ff7..8aa7d101e7c3e1ba1fda6d26817d07871dbb6d03 100644
--- a/src/sync/src/syncRetrieve.c
+++ b/src/sync/src/syncRetrieve.c
@@ -477,8 +477,8 @@ void *syncRetrieveData(void *param)
   if (pPeer->fileChanged) {
     // if file is changed 3 times continuously, start flow control
     pPeer->numOfRetrieves++;
-    if (pPeer->numOfRetrieves >= 3 && pNode->notifyFlowCtrl)  
-      (*pNode->notifyFlowCtrl)(pNode->ahandle, 1 << (pPeer->numOfRetrieves - 3));
+    if (pPeer->numOfRetrieves >= 2 && pNode->notifyFlowCtrl)  
+      (*pNode->notifyFlowCtrl)(pNode->ahandle, 4 << (pPeer->numOfRetrieves - 2));
   } else {
     pPeer->numOfRetrieves = 0;
     if (pNode->notifyFlowCtrl)