diff --git a/libpng.3 b/libpng.3
index b5269d7..c224700 100644
--- a/libpng.3
+++ b/libpng.3
@@ -2306,7 +2306,7 @@
  0.97c                     0.97      2.0.97
  0.98                      0.98      2.0.98
  0.99                      0.99      2.0.99
- 0.99a-g                   0.99      2.0.99
+ 0.99a-m                   0.99      2.0.99
  1.0                       1.00      2.1.0
 
 Henceforth the source version will match the shared-library minor
diff --git a/png.h b/png.h
index 13cb5a5..db2bac3 100644
--- a/png.h
+++ b/png.h
@@ -27,7 +27,7 @@
  *      0.97c                     0.97      2.0.97
  *      0.98                      0.98      2.0.98
  *      0.99                      0.99      2.0.99
- *      0.99a-i                   0.99      2.0.99
+ *      0.99a-m                   0.99      2.0.99
  *      1.00                      1.00      2.1.0
  *
  *    Henceforth the source version will match the shared-library minor
@@ -812,7 +812,7 @@
 extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr));
 #endif /* PNG_READ_PACK_SUPPORTED || PNG_WRITE_PACK_SUPPORTED */
 
-#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPOR)
+#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED)
 /* Swap packing order of pixels in bytes. */
 extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr));
 #endif /* PNG_READ_PACKSWAP_SUPPORTED || PNG_WRITE_PACKSWAP_SUPPOR */
diff --git a/pngrutil.c b/pngrutil.c
index a21a03f..7bc0f18 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * libpng 0.99
+ * libpng 1.00
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
diff --git a/pngtest.c b/pngtest.c
index 8ca4012..e1a3ea0 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -79,8 +79,7 @@
 }
 
 
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-    defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 /* example of using user transform callback (we don't transform anything,
    but merely count the black pixels) */
 
@@ -166,7 +165,7 @@
        }
     }
 }
-#endif /* PNG_READ|WRITE_USER_TRANSFORM_SUPPORTED */
+#endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
 
 static int verbose = 0;
 static int wrote_question = 0;
@@ -563,11 +562,10 @@
       png_set_read_status_fn(read_ptr, NULL);
    }
 
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-    defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-   black_pixels=0;
-   png_set_write_user_transform_fn(write_ptr, count_black_pixels);
-#endif
+#  if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+     black_pixels=0;
+     png_set_write_user_transform_fn(write_ptr, count_black_pixels);
+#  endif
 
    png_debug(0, "Reading info struct\n");
    png_read_info(read_ptr, read_info_ptr);
@@ -949,8 +947,7 @@
          fprintf(STDERR, "Testing %s:",argv[i]);
          kerror = test_one_file(argv[i], outname);
          if (kerror == 0) 
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-    defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
             fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels);
 #else
             fprintf(STDERR, " PASS\n");
@@ -996,8 +993,7 @@
          if(kerror == 0)
          {
             if(verbose == 1 || i == 2)
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-    defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
                 fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels);
 #else
                 fprintf(STDERR, " PASS\n");
diff --git a/pngwrite.c b/pngwrite.c
index c8f7abd..1a92322 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -225,7 +225,7 @@
 png_charp
 png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
 {
-   static const char short_months[12][4] =
+   static PNG_CONST char short_months[12][4] =
 	{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
 	 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 
diff --git a/scripts/makefile.tc3 b/scripts/makefile.tc3
index 03da184..6f8f366 100644
--- a/scripts/makefile.tc3
+++ b/scripts/makefile.tc3
@@ -14,15 +14,12 @@
 E=.exe
 
 # variables
-OBJS1 = png$(O) pngset$(O) pngget$(O) pngrutil$(O) pngtrans$(O)
-pngwutil$(O)
+OBJS1 = png$(O) pngset$(O) pngget$(O) pngrutil$(O) pngtrans$(O) pngwutil$(O)
 OBJS2 = pngmem$(O) pngpread$(O) pngread$(O) pngerror$(O) pngwrite$(O)
 OBJS3 = pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O)
 OBJSL1 = +png$(O) +pngset$(O) +pngget$(O) +pngrutil$(O) +pngtrans$(O)
-OBJSL2 = +pngwutil$(O) +pngmem$(O) +pngpread$(O) +pngread$(O)
-+pngerror$(O)
-OBJSL3 = +pngwrite$(O) +pngrtran$(O) +pngwtran$(O) +pngrio$(O)
-+pngwio$(O)
+OBJSL2 = +pngwutil$(O) +pngmem$(O) +pngpread$(O) +pngread$(O) +pngerror$(O)
+OBJSL3 = +pngwrite$(O) +pngrtran$(O) +pngwtran$(O) +pngrio$(O) +pngwio$(O)
 
 all: libpng.lib pngtest.exe
 
@@ -82,4 +79,4 @@
 pngtest$(E): pngtest$(O) libpng.lib
         $(CC) $(LDFLAGS) pngtest.obj libpng.lib zlib.lib
 
-# End of makefile for libpng
\ No newline at end of file
+# End of makefile for libpng
diff --git a/scripts/makefile.wat b/scripts/makefile.wat
index 9d41b2f..761aad5 100644
--- a/scripts/makefile.wat
+++ b/scripts/makefile.wat
@@ -9,7 +9,7 @@
 
 # ------------- Watcom 10a+ -------------
 MODEL=-mf
-CFLAGS= $(MODEL) -fpi87 -fp5 -5r -oaeilmnrt -s -i=..\zlib
+CFLAGS= $(MODEL) -fpi87 -fp5 -5r -oaeilmnrt -s -zp4 -i=..\zlib
 CC=wcc386
 LD=wcl386
 LIB=wlib -b -c