3 files changed, 4 insertions, 4 deletions
diff --git a/src/misc/zlib/deflate.c b/src/misc/zlib/deflate.c
index 04dcbf09..934196c8 100644
--- a/src/misc/zlib/deflate.c
+++ b/src/misc/zlib/deflate.c
@@ -1232,7 +1232,7 @@ local void check_match(deflate_state *s, IPos start, IPos match, int length)
 {
     /* check that the match is indeed a match */
     if (zmemcmp(s->window + match,
-                s->window + start, length) != EQUAL) {
+                s->window + start, (size_t)length) != EQUAL) {
         fprintf(stderr, " start %u, match %u, length %d\n",
                 start, match, length);
         do {
diff --git a/src/misc/zlib/gzwrite.c b/src/misc/zlib/gzwrite.c
index 44e116de..19015b44 100644
--- a/src/misc/zlib/gzwrite.c
+++ b/src/misc/zlib/gzwrite.c
@@ -128,7 +128,7 @@ local int gz_zero(gz_statep state, z_off64_t len)
         n = GT_OFF(state->size) || (z_off64_t)state->size > len ?
             (unsigned)len : state->size;
         if (first) {
-            memset(state->in, 0, n);
+            memset(state->in, 0, (size_t)n);
             first = 0;
         }
         strm->avail_in = n;
diff --git a/src/misc/zlib/zutil.h b/src/misc/zlib/zutil.h
index ad5dc411..26e37f31 100644
--- a/src/misc/zlib/zutil.h
+++ b/src/misc/zlib/zutil.h
@@ -239,11 +239,11 @@ ABC_NAMESPACE_HEADER_START
 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 #    define zmemcpy _fmemcpy
 #    define zmemcmp _fmemcmp
-#    define zmemzero(dest, len) _fmemset(dest, 0, len)
+#    define zmemzero(dest, len) _fmemset(dest, 0, (size_t)len)
 #  else
 #    define zmemcpy memcpy
 #    define zmemcmp memcmp
-#    define zmemzero(dest, len) memset(dest, 0, len)
+#    define zmemzero(dest, len) memset(dest, 0, (size_t)len)
 #  endif
 #else
    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));