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diff --git a/win32/Makefile b/win32/Makefile
index 2ffcb52..2e01729 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -49,6 +49,15 @@ INST_VER	= \5.00552
 #CFG		= Debug
 
 #
+# uncomment next option if you want to use the VC++ compiler optimization.
+# Warning: This is known to produce incorrect code for compiler versions
+# earlier than VC++ 98 (Visual Studio 6.0). VC++ 98 generates code that
+# successfully passes the Perl regression test suite. It hasn't yet been
+# widely tested with real applications though.
+#
+#CFG		= Optimize
+
+#
 # uncomment to enable use of PerlCRT.DLL when using the Visual C compiler.
 # Highly recommended.  It has patches that fix known bugs in MSVCRT.DLL.
 # This currently requires VC 5.0 with Service Pack 3.
@@ -206,8 +215,8 @@ OPTIMIZE	= -Od $(RUNTIME)d -Zi -D_DEBUG -DDEBUGGING
 !  ENDIF
 LINK_DBG	= -debug -pdb:none
 !ELSE
-!  IF "$(CCTYPE)" == "MSVC20"
-OPTIMIZE	= -Od $(RUNTIME) -DNDEBUG
+!  IF  "$(CFG)" == "Optimize"
+OPTIMIZE	= -O2 $(RUNTIME) -DNDEBUG
 !  ELSE
 OPTIMIZE	= -Od $(RUNTIME) -DNDEBUG
 !  ENDIF