diff --git a/codec/encoder/plus/src/welsEncoderExt.cpp b/codec/encoder/plus/src/welsEncoderExt.cpp
index 5cfe66cc..35b77020 100644
--- a/codec/encoder/plus/src/welsEncoderExt.cpp
+++ b/codec/encoder/plus/src/welsEncoderExt.cpp
@@ -640,7 +640,7 @@ void CWelsH264SVCEncoder::UpdateStatistics (const int64_t kiCurrentFrameTs, EVid
 
   if (m_pEncContext->iStatisticsLogInterval > 0) {
     int64_t iTimeDiff = kiCurrentFrameTs - m_pEncContext->iLastStatisticsLogTs;
-    if (iTimeDiff > m_pEncContext->iStatisticsLogInterval || 0 == pStatistics->uiInputFrameCount % 300) {
+    if ((iTimeDiff > m_pEncContext->iStatisticsLogInterval) || (0 == pStatistics->uiInputFrameCount % 300)) {
       if (iTimeDiff) {
         pStatistics->fLatestFrameRate = (pStatistics->uiInputFrameCount - m_pEncContext->iLastStatisticsFrameCount) * 1000 /
                                         iTimeDiff;