diff --git a/src/lzsa.c b/src/lzsa.c
index d17e2bb..9d6121f 100755
--- a/src/lzsa.c
+++ b/src/lzsa.c
@@ -295,7 +295,7 @@ int comparestream_open(lzsa_stream_t *stream, const char *pszCompareFilename, co
 
    pCompareStream->pCompareDataBuf = NULL;
    pCompareStream->nCompareDataSize = 0;
-   pCompareStream->f = (void*)fopen(pszCompareFilename, pszMode);
+   pCompareStream->f = (FILE*)fopen(pszCompareFilename, pszMode);
 
    if (pCompareStream->f) {
       stream->obj = pCompareStream;
diff --git a/src/matchfinder.c b/src/matchfinder.c
index fbdc5ca..3de2cfa 100644
--- a/src/matchfinder.c
+++ b/src/matchfinder.c
@@ -66,7 +66,7 @@ int lzsa_build_suffix_array(lzsa_compressor *pCompressor, const unsigned char *p
    int *PLCP = (int*)pCompressor->pos_data;  /* Use temporarily */
    int *Phi = PLCP;
    int nCurLen = 0;
-   int i;
+   int i, r;
 
    /* Compute the permuted LCP first (Kärkkäinen method) */
    Phi[intervals[0]] = -1;
@@ -132,7 +132,7 @@ int lzsa_build_suffix_array(lzsa_compressor *pCompressor, const unsigned char *p
    intervals[0] = 0;
    next_interval_idx = 1;
 
-   for (int r = 1; r < nInWindowSize; r++) {
+   for (r = 1; r < nInWindowSize; r++) {
       const unsigned int next_pos = SA_and_LCP[r] & POS_MASK;
       const unsigned int next_lcp = SA_and_LCP[r] & LCP_MASK;
       const unsigned int top_lcp = *top & LCP_MASK;
diff --git a/src/shrink_block_v1.c b/src/shrink_block_v1.c
index c30e4a9..d71b6a5 100644
--- a/src/shrink_block_v1.c
+++ b/src/shrink_block_v1.c
@@ -413,8 +413,6 @@ static int lzsa_get_compressed_size_v1(lzsa_compressor *pCompressor, lzsa_match
          int nMatchOffset = pMatch->offset;
          int nMatchLen = pMatch->length;
          int nEncodedMatchLen = nMatchLen - MIN_MATCH_SIZE_V1;
-         int nTokenLiteralsLen = (nNumLiterals >= LITERALS_RUN_LEN_V1) ? LITERALS_RUN_LEN_V1 : nNumLiterals;
-         int nTokenMatchLen = (nEncodedMatchLen >= MATCH_RUN_LEN_V1) ? MATCH_RUN_LEN_V1 : nEncodedMatchLen;
          int nTokenLongOffset = (nMatchOffset <= 256) ? 0x00 : 0x80;
          int nCommandSize = 8 /* token */ + lzsa_get_literals_varlen_size_v1(nNumLiterals) + (nNumLiterals << 3) + (nTokenLongOffset ? 16 : 8) /* match offset */ + lzsa_get_match_varlen_size_v1(nEncodedMatchLen);
 
@@ -429,7 +427,6 @@ static int lzsa_get_compressed_size_v1(lzsa_compressor *pCompressor, lzsa_match
    }
 
    {
-      int nTokenLiteralsLen = (nNumLiterals >= LITERALS_RUN_LEN_V1) ? LITERALS_RUN_LEN_V1 : nNumLiterals;
       int nCommandSize = 8 /* token */ + lzsa_get_literals_varlen_size_v1(nNumLiterals) + (nNumLiterals << 3);
 
       nCompressedSize += nCommandSize;
diff --git a/src/shrink_block_v2.c b/src/shrink_block_v2.c
index 111bd58..48a8598 100644
--- a/src/shrink_block_v2.c
+++ b/src/shrink_block_v2.c
@@ -441,7 +441,9 @@ static void lzsa_optimize_forward_v2(lzsa_compressor *pCompressor, const unsigne
                         }
 
                         if (!exists) {
-                           for (int nn = n;
+                           int nn;
+
+                           for (nn = n;
                               nn < nMatchesPerArrival && pDestSlots[nn].cost == nCodingChoiceCost;
                               nn++) {
                               if (pDestSlots[nn].rep_offset == nMatchOffset &&
@@ -806,7 +808,6 @@ static int lzsa_optimize_command_count_v2(lzsa_compressor *pCompressor, const un
 static int lzsa_get_compressed_size_v2(lzsa_compressor *pCompressor, lzsa_match *pBestMatch, const int nStartOffset, const int nEndOffset) {
    int i;
    int nNumLiterals = 0;
-   int nOutOffset = 0;
    int nRepMatchOffset = 0;
    int nCompressedSize = 0;
 
@@ -851,7 +852,6 @@ static int lzsa_get_compressed_size_v2(lzsa_compressor *pCompressor, lzsa_match
    }
 
    {
-      int nTokenLiteralsLen = (nNumLiterals >= LITERALS_RUN_LEN_V2) ? LITERALS_RUN_LEN_V2 : nNumLiterals;
       int nCommandSize = 8 /* token */ + lzsa_get_literals_varlen_size_v2(nNumLiterals) + (nNumLiterals << 3);
 
       nCompressedSize += nCommandSize;