diff --git a/build.bat b/build.bat
index d9bd41f..5d75ef5 100644
--- a/build.bat
+++ b/build.bat
@@ -6,7 +6,7 @@
 if NOT "%1" == "/?" goto start
 echo ":-----------------------------------------------------------------------"
 echo ":- Syntax: BUILD [-r] [fat32|fat16] [msc|wc|tc|tcpp|bc] [86|186|386]    "
-echo ":-               [debug] [lfnapi] [/L #] [/D value] [list] [upx]        "
+echo ":-               [debug] [lfnapi] [/L #] [/D value] [list] [upx] [win]  "
 echo ":- option case is significant !!                                        "
 echo ":- Note: Open Watcom (wc) is the preferred compiler                     "
 echo ":-----------------------------------------------------------------------"
@@ -52,6 +52,9 @@ if "%1" == "upx"   set XUPX=upx --8086 --best
 if "%1" == "debug" set ALLCFLAGS=%ALLCFLAGS% -DDEBUG
 if "%1" == "lfnapi" set ALLCFLAGS=%ALLCFLAGS% -DWITHLFNAPI
 
+if "%1" == "win"   set ALLCFLAGS=%ALLCFLAGS% -DWIN31SUPPORT
+if "%1" == "win"   set NASMFLAGS=%NASMFLAGS% -DWIN31SUPPORT
+
 if "%1" == "list"  set NASMFLAGS=%NASMFLAGS% -l$*.lst
 
 if "%1" == "/L"    goto setLoadSeg
@@ -71,6 +74,8 @@ if "%LAST%" == "" goto noenv
 :- finally - we are going to compile
 :-----------------------------------------------------------------------
 
+echo USING OPTIONS of C=[%ALLCFLAGS%] ASM=[%NASMFLAGS%]
+
 echo.
 echo Process UTILS ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 echo.