diff --git a/src/xpdev/sockwrap.h b/src/xpdev/sockwrap.h
index 7386c35f533d572e5d38f651751e1d6623b7ed62..5247f3212d41218e0a86a3b3dd0f35ad37067bcd 100644
--- a/src/xpdev/sockwrap.h
+++ b/src/xpdev/sockwrap.h
@@ -90,6 +90,8 @@
 #define ESHUTDOWN		(WSAESHUTDOWN-WSABASEERR)
 #undef  ECONNABORTED
 #define ECONNABORTED	(WSAECONNABORTED-WSABASEERR)
+#undef	EINPROGRESS
+#define EINPROGRESS		(WSAEINPROGRESS-WSABASEERR)
 
 #define s_addr			S_un.S_addr