diff --git a/srtcore/core.cpp b/srtcore/core.cpp
index 9d989190c..036f1c47b 100755
--- a/srtcore/core.cpp
+++ b/srtcore/core.cpp
@@ -6285,7 +6285,7 @@ void CUDT::sendCtrl(UDTMessageType pkttype, void* lparam, void* rparam, int size
    uint64_t currtime_tk;
    CTimer::rdtsc(currtime_tk);
 
-   ctrlpkt.m_iTimeStamp = int(currtime_tk/m_ullCPUFrequency - m_StartTime);
+   ctrlpkt.m_iTimeStamp = int(CTimer::getTime() - m_StartTime);;
 
    int nbsent = 0;
    int local_prevack = 0;
@@ -6333,9 +6333,6 @@ void CUDT::sendCtrl(UDTMessageType pkttype, void* lparam, void* rparam, int size
          break;
       }
 
-      uint64_t currtime_tk;
-      CTimer::rdtsc(currtime_tk);
-
       // There are new received packets to acknowledge, update related information.
       /* tsbpd thread may also call ackData when skipping packet so protect code */
       CGuard::enterCS(m_AckLock);