diff -Naur a/win32/Makefile.msc b/win32/Makefile.msc
--- a/win32/Makefile.msc	2017-01-15 09:07:08.000000000 -0800
+++ b/win32/Makefile.msc	2019-12-15 11:50:46.690189400 -0800
@@ -26,7 +26,7 @@
 LD = link
 AR = lib
 RC = rc
-CFLAGS  = -nologo -MD -W3 -O2 -Oy- -Zi -Fd"zlib" $(LOC)
+CFLAGS  = -nologo -W3 -Oy- -Zi -Fd"zlib" $(LOC)
 WFLAGS  = -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE
 ASFLAGS = -coff -Zi $(LOC)
 LDFLAGS = -nologo -debug -incremental:no -opt:ref