diff --git a/src/sync/src/syncRetrieve.c b/src/sync/src/syncRetrieve.c
index 7bd97f5abec4204658d83b9f905cbf9dd902e63c..b3908d2c576d8fead0a2d3dd14a613f946ea5ff7 100644
--- a/src/sync/src/syncRetrieve.c
+++ b/src/sync/src/syncRetrieve.c
@@ -478,7 +478,7 @@ void *syncRetrieveData(void *param)
     // if file is changed 3 times continuously, start flow control
     pPeer->numOfRetrieves++;
     if (pPeer->numOfRetrieves >= 3 && pNode->notifyFlowCtrl)  
-      (*pNode->notifyFlowCtrl)(pNode->ahandle, pPeer->numOfRetrieves - 2);
+      (*pNode->notifyFlowCtrl)(pNode->ahandle, 1 << (pPeer->numOfRetrieves - 3));
   } else {
     pPeer->numOfRetrieves = 0;
     if (pNode->notifyFlowCtrl)