diff --git a/ChangeLog b/ChangeLog
index 8160d28..95d3c3b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,15 @@
 
 		ChangeLog file for zlib
 
-Changes in 1.1 (24 Feb 98)
+Changes in 1.1.1 (27 Feb 98)
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+  compression ratio on some files. This also allows inlining _tr_tally for
+  matches in deflate_slow.
+- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
+
+Changes in 1.1.0 (24 Feb 98)
 - do not return STREAM_END prematurely in inflate (John Bowler)
 - revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
 - compile with -DFASTEST to get compression code optimized for speed only
diff --git a/INDEX b/INDEX
index 85d51a4..c436af6 100644
--- a/INDEX
+++ b/INDEX
@@ -13,6 +13,7 @@ descrip.mms		makefile for Vax/VMS
 zlib.3			mini man page for zlib (volunteers to write full
 			man pages from zlib.h welcome. write to jloup@gzip.org)
 
+msdos/Makefile.w32      makefile for Microsoft Visual C++ 32-bit
 msdos/Makefile.b32	makefile for Borland C++   32-bit
 msdos/Makefile.bor	makefile for Borland C/C++ 16-bit
 msdos/Makefile.dj2	makefile for DJGPP 2.x
diff --git a/Makefile b/Makefile
index 257f394..772bc31 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.1.0
+VER=1.1.1
 LIBS=libz.a
 SHAREDLIB=libz.so
 
diff --git a/Makefile.in b/Makefile.in
index 257f394..772bc31 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -23,7 +23,7 @@ CFLAGS=-O
 LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 
-VER=1.1.0
+VER=1.1.1
 LIBS=libz.a
 SHAREDLIB=libz.so
 
diff --git a/README b/README
index 5aacb53..acaea4f 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-zlib 1.1.0 is a general purpose data compression library.  All the code
+zlib 1.1.1 is a general purpose data compression library.  All the code
 is thread safe.  The data format used by the zlib library
 is described by RFCs (Request for Comments) 1950 to 1952 in the files 
 ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
@@ -25,15 +25,14 @@ Mark Nelson wrote an article about zlib for the Jan. 1997 issue of
 Dr. Dobb's Journal; a copy of the article is available in
 http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.1.0 are documented in the file ChangeLog.
-The main changes since 1.0.9 are:
+The changes made in version 1.1.1 are documented in the file ChangeLog.
+The main changes since 1.1.0 are:
 
-- do not return STREAM_END prematurely in inflate (John Bowler)
-- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
-- compile with -DFASTEST to get compression code optimized for speed only
-- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
-- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
-  on Sun but significant on HP)
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+  compression ratio on some files. This also allows inlining _tr_tally for
+  matches in deflate_slow.
 
 
 Unsupported third party contributions are provided in directory "contrib".
diff --git a/deflate.c b/deflate.c
index dc60299..4961b6b 100644
--- a/deflate.c
+++ b/deflate.c
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.1.0 Copyright 1995-1998 Jean-loup Gailly ";
+   " deflate 1.1.1 Copyright 1995-1998 Jean-loup Gailly ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -1294,8 +1294,8 @@ local block_state deflate_slow(s, flush)
 
             check_match(s, s->strstart-1, s->prev_match, s->prev_length);
 
-            bflush = _tr_tally(s, s->strstart -1 - s->prev_match,
-			       s->prev_length - MIN_MATCH);
+            _tr_tally_dist(s, s->strstart -1 - s->prev_match,
+			   s->prev_length - MIN_MATCH, bflush);
 
             /* Insert in hash table all strings up to the end of the match.
              * strstart-1 and strstart are already inserted. If there is not
@@ -1322,7 +1322,7 @@ local block_state deflate_slow(s, flush)
              */
             Tracevv((stderr,"%c", s->window[s->strstart-1]));
 	    _tr_tally_lit(s, s->window[s->strstart-1], bflush);
-            if (bflush) {
+	    if (bflush) {
                 FLUSH_BLOCK_ONLY(s, 0);
             }
             s->strstart++;
diff --git a/deflate.h b/deflate.h
index 34f5126..0483016 100644
--- a/deflate.h
+++ b/deflate.h
@@ -310,9 +310,9 @@ void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
     flush = (s->last_lit == s->lit_bufsize-1); \
   }
 #else
-# define _tr_tally_lit(s, c, flush) _tr_tally(s, 0, c, flush)
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
 # define _tr_tally_dist(s, distance, length, flush) \
-              _tr_tally(s, distance, length, flush) 
+              flush = _tr_tally(s, distance, length) 
 #endif
 
 #endif
diff --git a/inftrees.c b/inftrees.c
index 205ddc5..9f85187 100644
--- a/inftrees.c
+++ b/inftrees.c
@@ -7,7 +7,7 @@
 #include "inftrees.h"
 
 const char inflate_copyright[] =
-   " inflate 1.1.0 Copyright 1995-1998 Mark Adler ";
+   " inflate 1.1.1 Copyright 1995-1998 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
diff --git a/msdos/Makefile.w32 b/msdos/Makefile.w32
new file mode 100644
index 0000000..d513c81
--- /dev/null
+++ b/msdos/Makefile.w32
@@ -0,0 +1,97 @@
+# Makefile for zlib
+# Microsoft 32-bit Visual C++ 4.0 or later (may work on earlier versions)
+
+# To use, do "nmake /f makefile.w32"
+
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to CFLAGS below: 
+#   -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Microsoft Visual C++ 4.0 and later -------------
+MODEL=
+CFLAGS=-Ox -GA3s -nologo -W3
+CC=cl
+LD=link
+LDFLAGS=
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+  trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+  trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+  infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+  infutil$(O)+inffast$(O)
+
+all:  zlib.lib example.exe minigzip.exe
+
+adler32.obj: adler32.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
+   infcodes.h infutil.h
+  $(CC) -c $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
+   infcodes.h inffast.h
+  $(CC) -c $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+  $(CC) -c $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+  $(CC) -c $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+  $(CC) -c $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+  $(CC) -c $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+  $(CC) -c $(CFLAGS) $*.c
+
+zlib.lib: $(OBJ1) $(OBJ2)
+  if exist zlib.lib del zlib.lib
+  lib /OUT:zlib.lib $(OBJ1) $(OBJ2)
+
+example.exe: example.obj zlib.lib
+  $(LD) $(LDFLAGS) example.obj zlib.lib /OUT:example.exe /SUBSYSTEM:CONSOLE
+
+minigzip.exe: minigzip.obj zlib.lib
+  $(LD) $(LDFLAGS) minigzip.obj zlib.lib /OUT:minigzip.exe /SUBSYSTEM:CONSOLE
+
+test: example.exe minigzip.exe
+  example
+  echo hello world | minigzip | minigzip -d 
+
+#clean:
+#  del *.obj
+#  del *.exe
diff --git a/msdos/zlib.def b/msdos/zlib.def
index 2372ab1..e4edaad 100644
--- a/msdos/zlib.def
+++ b/msdos/zlib.def
@@ -8,7 +8,7 @@ SUBSYSTEM	WINDOWS
 
 STUB		'WINSTUB.EXE'
 
-VERSION		1.1
+VERSION		1.11
 
 CODE		 EXECUTE READ
 
diff --git a/msdos/zlib.rc b/msdos/zlib.rc
index 76e0ec2..2984720 100644
--- a/msdos/zlib.rc
+++ b/msdos/zlib.rc
@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,1,0,0
-  PRODUCTVERSION 1,1,0,0
+  FILEVERSION	 1,1,1,0
+  PRODUCTVERSION 1,1,1,0
   FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
   FILEFLAGS	0
   FILEOS	VOS_DOS_WINDOWS32
@@ -17,7 +17,7 @@ BEGIN
 
     BEGIN
       VALUE "FileDescription", "zlib data compression library\0"
-      VALUE "FileVersion",	"1.1.0\0"
+      VALUE "FileVersion",	"1.1.1\0"
       VALUE "InternalName",	"zlib\0"
       VALUE "OriginalFilename",	"zlib.dll\0"
       VALUE "ProductName",	"ZLib.DLL\0"
diff --git a/trees.c b/trees.c
index e09e94c..ef31043 100644
--- a/trees.c
+++ b/trees.c
@@ -1042,8 +1042,9 @@ int _tr_tally (s, dist, lc)
         s->dyn_dtree[d_code(dist)].Freq++;
     }
 
+#ifdef TRUNCATE_BLOCK
     /* Try to guess if it is profitable to stop the current block here */
-    if (s->level > 2 && (s->last_lit & 0xfff) == 0) {
+    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
         /* Compute an upper bound for the compressed length */
         ulg out_length = (ulg)s->last_lit*8L;
         ulg in_length = (ulg)((long)s->strstart - s->block_start);
@@ -1058,6 +1059,7 @@ int _tr_tally (s, dist, lc)
                100L - out_length*100L/in_length));
         if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
     }
+#endif
     return (s->last_lit == s->lit_bufsize-1);
     /* We avoid equality with lit_bufsize because of wraparound at 64K
      * on 16 bit machines and because stored blocks are restricted to
diff --git a/zlib.3 b/zlib.3
index ccde8f2..8519184 100644
--- a/zlib.3
+++ b/zlib.3
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "24 February 1998"
+.TH ZLIB 3 "27 February 1998"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -81,7 +81,7 @@ These documents are also available in other formats from:
 .IP
 ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 .SH AUTHORS
-Version 1.1.0
+Version 1.1.1
 Copyright (C) 1995-1998 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP
diff --git a/zlib.h b/zlib.h
index 135c2bd..06f988c 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.1.0, Feb 24th, 1998
+  version 1.1.1, Feb 27th, 1998
 
   Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
 
@@ -37,7 +37,7 @@ extern "C" {
 
 #include "zconf.h"
 
-#define ZLIB_VERSION "1.1.0"
+#define ZLIB_VERSION "1.1.1"
 
 /* 
      The 'zlib' compression library provides in-memory compression and