diff --git a/auto/lib/zlib/conf b/auto/lib/zlib/conf
index 60fd8d8..a779b21 100644
--- a/auto/lib/zlib/conf
+++ b/auto/lib/zlib/conf
@@ -2,13 +2,25 @@
 if [ $ZLIB != NONE ]; then
     CORE_INCS="$CORE_INCS -I $ZLIB"
 
-    if [ "$PLATFORM" = "win32" ]; then
-        CORE_LIBS="$CORE_LIBS zlib.lib"
-        CORE_LINK="$CORE_LINK -libpath:$ZLIB"
-    else
-        LINK_DEPS="$LINK_DEPS $ZLIB/libz.a"
-        CORE_LIBS="$CORE_LIBS -L $ZLIB -lz"
-    fi
+    case $CC in
+
+        cl)
+            LINK_DEPS="$LINK_DEPS $ZLIB/zlib.lib"
+            CORE_LIBS="$CORE_LIBS zlib.lib"
+            CORE_LINK="$CORE_LINK -libpath:$ZLIB"
+        ;;
+
+        wcl386)
+            LINK_DEPS="$LINK_DEPS $ZLIB/zlib.lib"
+            CORE_LIBS="$CORE_LIBS $ZLIB/zlib.lib"
+        ;;
+
+        *)
+            LINK_DEPS="$LINK_DEPS $ZLIB/libz.a"
+            CORE_LIBS="$CORE_LIBS -L $ZLIB -lz"
+        ;;
+
+    esac
 
 else
 
diff --git a/auto/lib/zlib/make b/auto/lib/zlib/make
index 78022c3..05b2e86 100644
--- a/auto/lib/zlib/make
+++ b/auto/lib/zlib/make
@@ -1,19 +1,52 @@
 
-echo "$ZLIB/libz.a:"                                     >> $MAKEFILE
+case $CC in
 
-case $PLATFORM in
-
-    *:i386)
-        echo "	cd $ZLIB \\"                             >> $MAKEFILE
-        echo "	&& cp contrib/asm686/match.S . \\"       >> $MAKEFILE
-        echo "	&& CFLAGS=\"-O3 -DASMV\" ./configure \\" >> $MAKEFILE
-        echo "	&& \$(MAKE) OBJA=match.o"                >> $MAKEFILE
+    cl)
+        makefile=makefile.msvc
     ;;
 
-    *)
-        echo "	cd $ZLIB && ./configure && \$(MAKE)"     >> $MAKEFILE
+    wcl386)
+        makefile=makefile.owc
     ;;
 
 esac
 
-echo                                                     >> $MAKEFILE
+
+case $PLATFORM in
+
+    win32)
+        echo "$ZLIB/zlib.lib:"                                    >> $MAKEFILE
+    ;;
+
+    *)
+        echo "$ZLIB/libz.a:"                                      >> $MAKEFILE
+    ;;
+
+esac
+
+
+case $PLATFORM in
+
+    win32)
+
+        cp auto/lib/zlib/$makefile $ZLIB
+        echo "	cd $ZLIB"                                         >> $MAKEFILE
+        echo "	\$(MAKE) -f $makefile OWC_OPT=$OWC_OPT"           >> $MAKEFILE
+        echo "	cd ..\\..\\.."                                    >> $MAKEFILE
+    ;;
+
+
+    *:i386)
+        echo "	cd $ZLIB \\"                                      >> $MAKEFILE
+        echo "	&& cp contrib/asm686/match.S . \\"                >> $MAKEFILE
+        echo "	&& CFLAGS=\"-O3 -DASMV\" ./configure \\"          >> $MAKEFILE
+        echo "	&& \$(MAKE) OBJA=match.o"                         >> $MAKEFILE
+    ;;
+
+    *)
+        echo "	cd $ZLIB && ./configure && \$(MAKE)"              >> $MAKEFILE
+    ;;
+
+esac
+
+echo                                                              >> $MAKEFILE
diff --git a/auto/lib/zlib/makefile.msvc b/auto/lib/zlib/makefile.msvc
new file mode 100644
index 0000000..69f0c18
--- /dev/null
+++ b/auto/lib/zlib/makefile.msvc
@@ -0,0 +1,8 @@
+
+CFLAGS = -nologo -c -MT -O2 -Ob1 -Oi -Gs
+
+zlib.lib:
+	cl $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c
+
+	link -lib -out:zlib.lib adler32.obj crc32.obj deflate.obj \
+		trees.obj zutil.obj
diff --git a/auto/lib/zlib/makefile.owc b/auto/lib/zlib/makefile.owc
new file mode 100644
index 0000000..3fa0260
--- /dev/null
+++ b/auto/lib/zlib/makefile.owc
@@ -0,0 +1,6 @@
+
+CFLAGS = -c -zq -bt=nt -ot -op -oi -oe -s -bm $(OWC_OPT)
+
+zlib.lib:
+	wcl386 $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c
+	wlib -n zlib.lib adler32.obj crc32.obj deflate.obj trees.obj zutil.obj