diff --git a/libMpegTPDec/src/tpdec_lib.cpp b/libMpegTPDec/src/tpdec_lib.cpp
index cee0768..2a40187 100644
--- a/libMpegTPDec/src/tpdec_lib.cpp
+++ b/libMpegTPDec/src/tpdec_lib.cpp
@@ -871,7 +871,7 @@ static TRANSPORTDEC_ERROR transportDec_readHeader(
   int fConfigFound = (pfConfigFound != NULL) ? *pfConfigFound : 0;
   int startPos;
 
-  startPos = FDKgetValidBits(hBs);
+  startPos = (INT)FDKgetValidBits(hBs);
 
   switch (hTp->transportFmt) {
     case TT_MP4_ADTS:
@@ -941,7 +941,7 @@ static TRANSPORTDEC_ERROR transportDec_readHeader(
           fTraverseMoreFrames = 0;
         }
         syncLayerFrameBits = (hTp->parser.adts.bs.frame_length << 3) -
-                             ((INT)startPos - (INT)FDKgetValidBits(hBs)) -
+                             (startPos - (INT)FDKgetValidBits(hBs)) -
                              syncLength;
         if (syncLayerFrameBits <= 0) {
           err = TRANSPORTDEC_SYNC_ERROR;
@@ -952,7 +952,7 @@ static TRANSPORTDEC_ERROR transportDec_readHeader(
       break;
     case TT_MP4_LOAS:
       if (hTp->numberOfRawDataBlocks <= 0) {
-        syncLayerFrameBits = FDKreadBits(hBs, 13);
+        syncLayerFrameBits = (INT)FDKreadBits(hBs, 13);
         hTp->parser.latm.m_audioMuxLengthBytes = syncLayerFrameBits;
         syncLayerFrameBits <<= 3;
       }
@@ -974,7 +974,7 @@ static TRANSPORTDEC_ERROR transportDec_readHeader(
           hTp->numberOfRawDataBlocks =
               CLatmDemux_GetNrOfSubFrames(&hTp->parser.latm);
           if (hTp->transportFmt == TT_MP4_LOAS) {
-            syncLayerFrameBits -= startPos - FDKgetValidBits(hBs) - (13);
+            syncLayerFrameBits -= startPos - (INT)FDKgetValidBits(hBs) - (13);
           }
         }
       } else {