diff --git a/src/include/os/WIN32/osiSock.h b/src/include/os/WIN32/osiSock.h
index f229782ad..e35145150 100644
--- a/src/include/os/WIN32/osiSock.h
+++ b/src/include/os/WIN32/osiSock.h
@@ -30,6 +30,9 @@ void ipAddrToA (const struct sockaddr_in *pInetAddr,
 #define EADDRINUSE               WSAEADDRINUSE
 #define ECONNREFUSED             WSAECONNREFUSED
 #define ECONNABORTED             WSAECONNABORTED
+#define EINPROGRESS		 WSAEINPROGRESS
+#define EISCONN			 WSAEISCONN
+#define EALREADY		 WSAEALREADY
 
 /*
  *      Under WIN32, FD_SETSIZE is the max. number of sockets,
diff --git a/src/libCom/osi/os/WIN32/osdSock.h b/src/libCom/osi/os/WIN32/osdSock.h
index f229782ad..e35145150 100644
--- a/src/libCom/osi/os/WIN32/osdSock.h
+++ b/src/libCom/osi/os/WIN32/osdSock.h
@@ -30,6 +30,9 @@ void ipAddrToA (const struct sockaddr_in *pInetAddr,
 #define EADDRINUSE               WSAEADDRINUSE
 #define ECONNREFUSED             WSAECONNREFUSED
 #define ECONNABORTED             WSAECONNABORTED
+#define EINPROGRESS		 WSAEINPROGRESS
+#define EISCONN			 WSAEISCONN
+#define EALREADY		 WSAEALREADY
 
 /*
  *      Under WIN32, FD_SETSIZE is the max. number of sockets,