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-rw-r--r--win32/Makefile.sub2
1 files changed, 1 insertions, 1 deletions
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 972e6933f5..1301d86fff 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -249,7 +249,7 @@ COMMON_MACROS = WIN32_LEAN_AND_MEAN WIN32
!if !defined(USE_WINSOCK2)
COMMON_HEADERS = winsock.h
!else
-COMMON_HEADERS = winsock2.h
+COMMON_HEADERS = winsock2.h ws2tcpip.h
!endif
COMMON_HEADERS = $(COMMON_HEADERS) windows.h
!endif