diff --git a/codec/console/enc/src/welsenc.cpp b/codec/console/enc/src/welsenc.cpp
index 03f5701e..75169eaf 100644
--- a/codec/console/enc/src/welsenc.cpp
+++ b/codec/console/enc/src/welsenc.cpp
@@ -707,7 +707,7 @@ int ProcessEncoding (ISVCEncoder* pPtrEnc, int argc, char** argv, bool bConfigFi
   FILE* fpGolden = NULL;
 #endif
 #if defined ( STICK_STREAM_SIZE )
-  FILE* fTrackStream = fopen ("coding_size.stream", "wb");;
+  FILE* fTrackStream = fopen ("coding_size.stream", "wb");
 #endif
   SFilesSet fs;
   // for configuration file
diff --git a/codec/decoder/core/src/deblocking.cpp b/codec/decoder/core/src/deblocking.cpp
index 677c2709..e62a9b9e 100644
--- a/codec/decoder/core/src/deblocking.cpp
+++ b/codec/decoder/core/src/deblocking.cpp
@@ -633,7 +633,7 @@ void FilteringEdgeChromaHV (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, in
   }
 
   pFilter->iChromaQP[0]   = pCurQp[0];
-  pFilter->iChromaQP[1]   = pCurQp[1];;
+  pFilter->iChromaQP[1]   = pCurQp[1];
   if (pFilter->iChromaQP[0] == pFilter->iChromaQP[1]) {
     GET_ALPHA_BETA_FROM_QP (pFilter->iChromaQP[0], pFilter->iSliceAlphaC0Offset, pFilter->iSliceBetaOffset, iIndexA, iAlpha,
                             iBeta);
diff --git a/codec/decoder/core/src/error_concealment.cpp b/codec/decoder/core/src/error_concealment.cpp
index 824626b8..b253cc5b 100644
--- a/codec/decoder/core/src/error_concealment.cpp
+++ b/codec/decoder/core/src/error_concealment.cpp
@@ -125,7 +125,7 @@ void DoErrorConSliceCopy (PWelsDecoderContext pCtx) {
         if (pSrcPic != NULL) {
           iSrcStride = pSrcPic->iLinesize[0];
           //Y component
-          pDstData = pDstPic->pData[0] + iMbY * 16 * iDstStride + iMbX * 16;;
+          pDstData = pDstPic->pData[0] + iMbY * 16 * iDstStride + iMbX * 16;
           pSrcData = pSrcPic->pData[0] + iMbY * 16 * iSrcStride + iMbX * 16;
           pCtx->sCopyFunc.pCopyLumaFunc (pDstData, iDstStride, pSrcData, iSrcStride);
           //U component
diff --git a/codec/encoder/core/src/ratectl.cpp b/codec/encoder/core/src/ratectl.cpp
index d6eec212..f68aae2d 100644
--- a/codec/encoder/core/src/ratectl.cpp
+++ b/codec/encoder/core/src/ratectl.cpp
@@ -564,7 +564,7 @@ void RcInitGomParameters (sWelsEncCtx* pEncCtx) {
   const int32_t kiGlobalQp			= pEncCtx->iGlobalQp;
 
   pWelsSvcRc->iAverageFrameQp = 0;
-  pWelsSvcRc->iMinFrameQp = 51;;
+  pWelsSvcRc->iMinFrameQp = 51;
   pWelsSvcRc->iMaxFrameQp = 0;
   for (int32_t i = 0; i < kiSliceNum; ++i) {
     pSOverRc->iComplexityIndexSlice	= 0;
diff --git a/codec/processing/src/complexityanalysis/ComplexityAnalysis.cpp b/codec/processing/src/complexityanalysis/ComplexityAnalysis.cpp
index b5f0bc01..7164986c 100644
--- a/codec/processing/src/complexityanalysis/ComplexityAnalysis.cpp
+++ b/codec/processing/src/complexityanalysis/ComplexityAnalysis.cpp
@@ -322,7 +322,7 @@ EResult CComplexityAnalysisScreen::Process (int32_t nType, SPixMap* pSrc, SPixMa
   } else if (!bScrollFlag || ((iScrollMvX == 0) && (iScrollMvY == 0))) {
     GomComplexityAnalysisInter (pSrc, pRef, 0);
   } else {
-    GomComplexityAnalysisInter (pSrc, pRef, 1);;
+    GomComplexityAnalysisInter (pSrc, pRef, 1);
   }
 
   return RET_SUCCESS;
diff --git a/test/api/encode_decode_api_test.cpp b/test/api/encode_decode_api_test.cpp
index 3e565a79..b2011be2 100644
--- a/test/api/encode_decode_api_test.cpp
+++ b/test/api/encode_decode_api_test.cpp
@@ -3023,7 +3023,7 @@ TEST_F (EncodeDecodeTestAPI, ParameterSetStrategy_SPS_PPS_LISTING3) {
 
 TEST_F (EncodeDecodeTestAPI, SimulcastSVC) {
 #define LAYER_NUM (4)
-  int iSpatialLayerNum = WelsClip3 ((rand() % LAYER_NUM), 2, LAYER_NUM);;
+  int iSpatialLayerNum = WelsClip3 ((rand() % LAYER_NUM), 2, LAYER_NUM);
   int iWidth       = WelsClip3 ((((rand() % MAX_WIDTH) >> 1)  + 1) << 1, 1 << iSpatialLayerNum, MAX_WIDTH);
   int iHeight      = WelsClip3 ((((rand() % MAX_HEIGHT) >> 1)  + 1) << 1, 1 << iSpatialLayerNum, MAX_HEIGHT);
   float fFrameRate = rand() + 0.5f;
@@ -3137,7 +3137,7 @@ TEST_F (EncodeDecodeTestAPI, SimulcastSVC) {
 TEST_F (EncodeDecodeTestAPI, SimulcastAVC) {
 //#define DEBUG_FILE_SAVE3
 #define LAYER_NUM (4)
-  int iSpatialLayerNum = WelsClip3 ((rand() % LAYER_NUM), 2, LAYER_NUM);;
+  int iSpatialLayerNum = WelsClip3 ((rand() % LAYER_NUM), 2, LAYER_NUM);
   int iWidth       = WelsClip3 ((((rand() % MAX_WIDTH) >> 1)  + 1) << 1, 1 << iSpatialLayerNum, MAX_WIDTH);
   int iHeight      = WelsClip3 ((((rand() % MAX_HEIGHT) >> 1)  + 1) << 1, 1 << iSpatialLayerNum, MAX_HEIGHT);
   float fFrameRate = rand() + 0.5f;
diff --git a/test/decoder/DecUT_ParseSyntax.cpp b/test/decoder/DecUT_ParseSyntax.cpp
index 01c039e6..3c2b0e51 100644
--- a/test/decoder/DecUT_ParseSyntax.cpp
+++ b/test/decoder/DecUT_ParseSyntax.cpp
@@ -250,9 +250,9 @@ void DecoderParseSyntaxTest::TestScalingList() {
   Init();
   DecodeBs ("res/BA_MW_D.264");
   ASSERT_TRUE (m_pCtx->sSpsBuffer[0].bSeqScalingMatrixPresentFlag == false);
-  EXPECT_EQ (0, memcmp (iScalingListPPS, m_pCtx->sSpsBuffer[0].iScalingList4x4, 6 * 16 * sizeof (uint8_t)));;
+  EXPECT_EQ (0, memcmp (iScalingListPPS, m_pCtx->sSpsBuffer[0].iScalingList4x4, 6 * 16 * sizeof (uint8_t)));
   ASSERT_TRUE (m_pCtx->sPpsBuffer[0].bPicScalingMatrixPresentFlag == false);
-  EXPECT_EQ (0, memcmp (iScalingListPPS, m_pCtx->sPpsBuffer[0].iScalingList4x4, 6 * 16 * sizeof (uint8_t)));;
+  EXPECT_EQ (0, memcmp (iScalingListPPS, m_pCtx->sPpsBuffer[0].iScalingList4x4, 6 * 16 * sizeof (uint8_t)));
   Uninit();
   //Scalinglist value just written into sps and pps
   Init();
diff --git a/test/encoder/EncUT_MotionEstimate.cpp b/test/encoder/EncUT_MotionEstimate.cpp
index f1224bef..194587c8 100644
--- a/test/encoder/EncUT_MotionEstimate.cpp
+++ b/test/encoder/EncUT_MotionEstimate.cpp
@@ -278,7 +278,7 @@ TEST_F (MotionEstimateRangeTest, TestWelsMotionCrossSearch) {
       sMe.iCurMeBlockPixX = (iMbx << 4);
       sMe.iCurMeBlockPixY = (iMby << 4);
       sMe.pRefMb = pRef + sMe.iCurMeBlockPixX + sMe.iCurMeBlockPixY * m_iWidthExt;
-      sMe.pEncMb = m_pSrc + sMe.iCurMeBlockPixX + sMe.iCurMeBlockPixY * m_iWidth;;
+      sMe.pEncMb = m_pSrc + sMe.iCurMeBlockPixX + sMe.iCurMeBlockPixY * m_iWidth;
       sMe.uiSadCost = sMe.uiSatdCost = kiMaxBlock16Sad;
       sMe.pColoRefMb = sMe.pRefMb;
       WelsMotionCrossSearch (&sFuncList, &sMe, &sSlice, m_iWidth, m_iWidthExt);