1 files changed, 1 insertions, 1 deletions
diff --git a/imap/src/osdep/nt/makefile.old b/imap/src/osdep/nt/makefile.old
index 028c98ba..5da00539 100644
--- a/imap/src/osdep/nt/makefile.old
+++ b/imap/src/osdep/nt/makefile.old
@@ -31,7 +31,7 @@ AUTHENTICATORS = ext md5 pla log
 DRIVERS = imap nntp pop3 mbx mtx tenex unix
 CREATEDRIVER = mbx
 APPENDDRIVER = unix
-OSCOMPAT = /DWIN32 /D_WIN32_WINNT=0x0400
+OSCOMPAT = /DWIN32 /D_WIN32_WINNT=0x0501
 VSCOMPAT = /D_CRT_SECURE_NO_DEPRECATE /D_CRT_NONSTDC_NO_DEPRECATE
 CFLAGS = /MT /W3 /Ox /DCHUNKSIZE=65536 $(OSCOMPAT) $(VSCOMPAT) -nologo /I.. $(EXTRACFLAGS)
 CC = cl